論文リスト
Preprints /
Published papers/
その他
PREPRINTS
- K. Miyagawa, S. Maegochi, K. Ienaga, S. Kaneko and S. Okuma
Effects of the velocity on the reversible-irreversible transition in a
periodically sheared vortex system
PUBLISHED PAPERS (1995-)
- K. Ienaga, T. Hayashi, Y. Tamoto, S. Kaneko, and S. Okuma
Quantum Criticality inside the Anomalous Metallic State of a Disordered
Superconducting Thin Film
Phys. Rev. Lett. (2020), accepted for publication.
- 家永紘一郎, 大熊 哲
熱電効果で探る2 次元超伝導体の量子臨界現 象と渦糸状態
固体物理 55 No. 12 (2020), 印刷中
- S. Maegochi, K. Ienaga, S. Kaneko, and S. Okuma
Critical behavior near the reversible-irreversible transition in periodically driven vortices under random local shear (OPEN ACCESS)
Scientific Reports 9 (2019) 16447(1-9): doi:10.1038/s41598-019-51060-9.
- J. Wu, F. Lin, M. Sasase, K. Ienega, Y. Obata, R. Yukawa, K. Horibe,
H. Kumigashira, S. Okuma, T. Inoshita, and H. Hosono
Natural van der Waals Heterostructural Single Crystals with both Magnetic and Topological Properties (OPEN ACCESS)
Science Advances 5 (2019) eaax9989.
- M. Dobroka, K. Ienaga, Y. Kawamura, S. Kaneko, and S. Okuma
Competition between dynamic ordering and disordering for vortices driven by superimposed ac and dc forces (OPEN ACCESS)
New J. Phys. 21 (2019) 043007(1-10).
- K. Ienaga, T. Arai, T. Hayashi, S. Kaneko, and S. Okuma
Detection of the vortex-liquid phase in superconducting films by Nernst effect (OPEN ACCESS)
J. Phys.: Conf. Ser. 1293 (2019) 012022(1-4).
- S. Maegochi, M. Dobroka, K. Ienaga, S. Kaneko, and S. Okuma
Time evolution of the vortex configuration associated with dynamic ordering detected by dc drive (OPEN ACCESS)
J. Phys.: Conf. Ser. 1293 (2019) 012023(1-5).
- J. Lustikova, Y. Shiomi, N. Yokoi, N. Kabeya, N. Kimura, K. Ienaga,
S. Kaneko, S. Okuma,
S. Takahashi, and E. Saitoh
Vortex rectenna powered by environmental fluctuations (OPEN ACCESS)
(プレスリリース)
Nature Commun. 9, 4922 (2018)
- Y. Kawamura, S. Moriya, K. Ienaga, S. Kaneko, and S. Okuma
Nonequilibrium depinning transition of ac driven vortices
with random pinning (OPEN ACCESS)
New J. Phys. 19 (2017) 093001(1-8).
- M. Dobroka, Y. Kawamura, K. Ienaga, S. Kaneko, and S. Okuma
Memory formation and evolution of the vortex configuration
associated with random organization (OPEN ACCESS)
New J. Phys. 19 (2017) 053023(1-11).
- N. Sohara, A. Ochi, E. Murakami, K. Ienaga, S. Kaneko, N. Kokubo, and
S. Okuma
Vortex states near absolute zero in a weak-pinning
amorphous MoxGe1-x film probed by pulsed mode-locking resonance (OPEN ACCESS)
J. Phys.: Conf. Ser. 871 (2017) 012022(1-8).
- K. Ienaga, M. Dobroka, Y. Shirahata, Y. Kawamura, S. Kaneko, and
S. Okuma
Random organization of vortices under an anisotropic
condition (OPEN ACCESS)
J. Phys.: Conf. Ser. 871 (2017) 012020(1-4).
- 大熊 哲(分担)
磁束系の動的相図と非平衡ダイナミクス
「超伝導磁束状態の物理」, 裳華房, 2017
- 大熊 哲
超伝導渦糸格子のダイナミクスと非平衡相転移
固体物理 51 No. 10 (2016) 547-566 (Selected as a cover page)
- A. Ochi, N. Sohara, S. Kaneko, N. Kokubo, and S. Okuma
Equilibrium and Dynamic Vortex States near Absolute Zero in a Weak
Pinning Amorphous Film
J. Phys. Soc. Jpn. 85, No.4 (2016) 044701(1-7).
- A. Ochi, Y. Kawamura, T. Inoue, T. Kaji, M. Dobroka, S. Kaneko,
N. Kokubo, and S. Okuma
Dynamic Melting of Driven Abrikosov Lattices in an Amorphous
MoxGe1-x Film in Tilted Field
J. Phys. Soc. Jpn. 85 No.3 (2016) 034712(1-6).
- Y. Kawamura and S. Okuma
Dynamics of Superconducting Vortices Driven by Periodic Shear in the Plastic-Flow and Flux-Flow Regimes
JPS Conf. Proc. 4 (2015) 011007(1-4).
- Y. Kawamura and S. Okuma
Dynamics of Superconducting Vortices Driven by Periodic Shear in the Plastic-Flow and Flux-Flow Regimes
JPS Conf. Proc. 4 (2015) 011007(1-4).
- Y. Kawamura, Y. Matsumura, Y. Yamazaki, S. Kaneko, N. Kokubo, and
S. Okuma
Unusual current-voltage characteristics and dynamic correlation of rotating
vortex-lattice rings
Supercond. Sci. Technol. 28 (2015) 045002(1-7).
- E. Murakami, A. Ochi, Y. Kawamura, S. Kaneko, and S. Okuma
Magnetic-Field-Induced Metallic Phase at Low Temperature in Two-Dimensional
Superconductors
Phys. Procedia 65 (2015) 101-104.
- R. Nitta, Y. Kawamura, S. Kaneko, and S. Okuma
Reversible to
irreversible flow transition of periodically driven vortices in the strip
sample
Phys. Procedia 65 (2015) 105-108.
- K. Kamimura, K. Nagatani, and S. Okuma
Rearrangement of the Fast Driven Abrikosov Lattice in a Superconducting
Amorphous Film in Tilted Field
JPS Conf. Proc. 2, 010203 (2014)(1-6).
- S. Okuma, A. Motohashi, and Y. Kawamura
Critical dynamics associated with dynamic disordering near the depinning
transition in different vortex phases
Phys. Lett. A 377 (2013) 2990-2994.
- S. Okuma, A. Motohashi, and Y. Kawamura
Scaling analysis on plastic depinning of vortex matter at low temperature
in an amorphous MoxGe1-x film
Supercond. Sci. Technol. 26 (2013) 025013 (1-6).
- S. Okuma and A. Motohashi
Critical behavior associated with transient dynamics near
the depinning transition (OPEN ACCESS)
New J. Phys. 14 (2012) 123021 (1-11).
- S. Okuma, D. Shimamoto, and N. Kokubo
Velocity-induced reorientation of fast driven Abrikosov lattice
Phys. Rev. B 85 (2012) 064508 (1-5).
- S. Okuma, Y. Kawamura, and Y. Tsugawa
Irreversibility and Dislocation in Periodically Sheared Vortex Matter
J. Phys. Soc. Jpn. 81 (2012) 114718 (1-6).
- S. Okuma, D. Shimamoto, and N. Kokubo
Dynamic ordering and lattice orientation of driven vortex matter
J. Phys.: Conf. Ser. 400 (2012) 022093 (1-4).
- H. Sato and S. Okuma
Absence of mode-locking resonance for driven vortices in a thin
amorphous a-MoxGe1-x film
J. Phys.: Conf. Ser. 400 (2012) 022103 (1-4).
- S. Okuma, H. Imaizumi, D. Shimamoto, and N. Kokubo
Quantum melting and lattice orientation of driven vortex matter
Phys. Rev. B 83 (2011) 064520 (1-7).
- S. Okuma, Y. Tsugawa, and A. Motohashi
Transition from reversible to irreversible flow: Absorbing and depinning
transitions in a sheared-vortex system
Phys. Rev. B 83 (2011) 012503.
- D. Shimamoto, S. Okuma, and N. Kokubo
Lattice orientation of driven vortex matter in amorphous superconducting
films
(GCOE2011) J. Phys.: Conf. Ser. 302 (2011) 012027 (1-4).
- A. Motohashi and S. Okuma
Plastic depinning in superconducting vortices
(GCOE2011) J. Phys.: Conf. Ser. 302 (2011) 012029 (1-4).
- H. Sato and S. Okuma
Mode-locking resonance for driven vortex matter in thick and thin
superconducting films
(GCOE2011) J. Phys.: Conf. Ser. 302 (2011) 012028 (1-4).
- Y. Matsumura, S. Okuma, and K. Kokubo
Rotating vortex-lattice rings in superconductors
Physica E 43 (2011) 707-710.
- S. Okuma, Y. Yamazaki, and K. Kokubo
Novel vortex dynamics in Corbino-disk superconductors
9th Int. Conf. on Materials and Mechanisms of Superconductivity (M2S)
(invited talk): Physica C 470 (2010) S776-S778.
- S. Okuma, T. Ichimura, H. Takeya, and K. Hirata
Unusual Pinning Induced by Vortex Motion in
YNi2B2C
Physica C 470 (2010) S844-S845.
- S. Okuma, Y. Suzuki, and Y. Tsugawa
Reversible to Irreversible Flow Transition in Driven Vortices
Physica C 470 (2010) S842-S843.
- S. Okuma, Y. Yamazaki, and K. Kokubo
Dynamic response and ordering of rotating vortices in superconducting Corbino disks
Phys. Rev. B 80 (2009) 220501(R) (1-4).
- S. Okuma, H. Imaizumi, and K. Kokubo
Intrinsic quantum melting of a driven vortex lattice in amorphous
a-MoxGe1-x films
Phys. Rev. B 80 (2009) 132503 (1-4).
- S. Okuma, Y. Suzuki, and K. Kokubo
Flow noise of driven vortex matter in amorphous superconducting films
AIP Conf. Proc. 1129 (2009) 93-96 (Selected as an oral presentation)
(ICNF2009)
- S. Okuma, J. Inoue, and K. Kokubo
Broadband noise of driven vortices at the mode-locking resonance
Proc. Int. Conf. on Noise and Fluct.,
Pisa, 2009 Eds. M. Macucci and G. Basso (ICNF2009):
AIP Conf. Proc. 1129 (2009) 117-120:
- S. Okuma, Y. Suzuki, and N. Kokubo
Order-disorder transition and flow noise in an
a-MoxGe1-x film
Physica C 469 (2009) 1096-1098.
- S. Okuma, H. Imaizumi, Y. Suzuki, and N. Kokubo
Dynamic melting of driven vortex matter below 1 K
Physica C 469 (2009) 1063-1066.
- S. Okuma, T. Ichimura, H. Takeya, K. Hirata
Anomalous vortex dynamics in YNi2B2C
Physica C 469 (2009) 1093-1095.
- 大熊 哲, 井上 甚, 小久保伸人
超伝導渦の動的秩序化
固体物理 44, No. 1 (2009) 1-15 (Selected as a cover page).
- S. Okuma, Y. Suzuki, K. Kashiro, and N. Kokubo
Order-disorder transition and flow noise for vortices in
amorphous films
25th Int. Conf. Low Temp. Phys., (LT25) 2008 (Selected as an oral
presentation);
J. Phys.: Conf. Ser. 150 (2009) 052199 (1-4).
- S. Okuma, H. Imaizumi, K. Suzuki, Y. Suzuki, and N. Kokubo
Dynamic melting of driven vortices at low temperature in
a-MoxGe1-x films
J. Phys.: Conf. Ser. 150 (2009) 052200 (1-4).
- S. Okuma, Y. Suzuki, Y. Yamazaki, and N. Kokubo
Motion of current-driven vortex solids with weak pinning in the
Corbino disk
Physica C 468 (2008) 613-616:
Proc. 5th Conf. on Vortex Matter in Nanostructured Superconductors
(VORTEX V), Rhodes, Greece, 2007 (invited).
- S. Okuma and Y. Suzuki
Effects of heating on superconducting properties of amorphous
a-MgxB1-x films
Physica C 468 (2008) 1178-1180.
- S. Okuma, Y. Suzuki, Y. Yamazaki, J. Inoue, and N.
Kokubo
Dynamic response of circulating flux flow in amorphous
superconducting films
Physica C 468 (2008) 1322-1324.
- S. Okuma, K. Kashiro, and N. Kokubo
Vortex states in the peak effect regime of
a-MoxGe1-x films probed by noise
Physica C 468 (2008) 1319-1321.
- S. Okuma, K. Kashiro, Y. Suzuki, and N. Kokubo
Order-disorder transition of vortex matter in
a-MoxGe1-x films probed by noise
Phys. Rev. B 77 (2008) 212505.
- S. Okuma, J. Inoue, and N. Kokubo
Suppression of broadband noise at mode locking in driven vortex
matter
Phys. Rev. B 76 (2007) 172503.
(Selected for the Virtual Journal of Applications of
Superconductivity 13 (2007)
- S. Okuma, S. Morishima, and M. Kamada
Dynamic Transition and Metastability in the Nonlinear I-V Regime
in a Corbino-Disk Superconductor
Phys. Rev. B 76 (2007) 224521.
(Selected for the Virtual Journal of Applications of
Superconductivity 14 (2008)
- S. Okuma, J. Inoue, and N. Kokubo
Mode locking and noise of driven vortices near the peak-effect
regime
Physica C 463 (2007) 290-293.
- S. Okuma, K. Suzuki, and M. Kohara
Vortex Phase Diagram and Dynamics near T=0 in the Liquid Phase of
a Thick a-MoxGe1-x Film
Int. J. Mod. Phys. B 21 (2007) 3371 - 3378 (Invited)..
- S. Okuma, K. Kashiro, and N. Kokubo
Vortex states and peak effect at low temperature in thick
amorphous films with weak pinning
Int. J. Mod. Phys. B 21 (2007) 3387 - 3393..
- S. Okuma, K. Suzuki, and N. Kokubo
Vortex phase diagram and dynamics at low temperature in a thick
a-MoxGe1-x film
Physica C 463 (2007) 232-235.
- S. Okuma, J. Inoue, and N. Kokubo
Broadband noise across the mode-locking freezing in driven vortex
matter
Int. J. Mod. Phys. B 21 (2007) 3379 - 3386..
- S. Okuma, K. Suzuki, and N. Kokubo
Vortex phase diagram and dynamics near T=0 probed by voltage noise
in amorphous superconducting films
AIP Conf. Proc. 922 (2007) 237-240..
- S. Okuma, J. Inoue, and N. Kokubo
Noise and mode-locking resonance of driven vortices in type-II
superconductors
AIP Conf. Proc. 922 (2007) 233-236.
- S. Okuma, K. Kashiro, and N. Kokubo
Vortex states near the peak effect regime detected by voltage
noise
AIP Conf. Proc. 922 (2007) 245-248.
- S. Okuma and S. Morishima
Anomalous voltage oscillation and metastability in the strongly
nonlinear I-V regime
Physica C 460-462 (2007) 1278-1279. .
- S. Okuma and M. Kohara
Vortex phase diagram and vortex dynamics at low temperature in a
thick a-MgxB1-x film
Physica C 460-462 (2007) 1276-1277.
- S. Okuma, T. Kishimoto, and K. Kainuma
Vortex dynamics detected by voltage noise in the quantum-liquid
phase of thick amorphous films
Physica C 460-462 (2007) 1274-1275. .
- S. Okuma and T. Katagiri a
Motion of current-driven vortex solids in the Corbino-disk of
amorphous superconducting films
Physica C 460-462 (2007) 1280-1281. .
- S. Okuma, K. Kainuma, and M. Kohara
Vortex Flow and Shot Noise in the Quantum-Liquid Phase of Thick
Amorphous Films
Phys. Rev. B 74 (2006) 144509(1-5) (as a regular article).
- S. Okuma, K. Kainuma, and T. Kishimoto
Anomalous Vortex Flow and Noise in the Quantum Liquid Phase of
Amorphous Films
Proc. Conf. on Vortex Matter in Nanostructured Superconductors
(VORTEX IV), Crete, Greece, 2005 (invited); Physica C
437-438 (2006) 242-246.
- S. Okuma, K. Kainuma, and T. Kishimoto
Unusual Vortex Motion in the Quantum-Liquid Phase of Amorphous
Films
AIP Conf. Proc. 85 (2006) 967-968.
- S. Okuma, T. Kishimoto, and K. Kainumao
Electronic Transport in the Low-Temperature Liquid Phase of a Thin
Amorphous Film without the Edge Effects
AIP Conf. Proc. 85 (2006) 969-970.
- S. Okuma and S. Morishima
Plastic Flow and Dynamic Correlation in the Driven Vortex Glass in
the Corbino Disk
AIP Conf. Proc. 85 (2006) 845-846.
- S. Okuma and S. Morishima
Voltage Oscillation due to Vortex-Antivortex Fluctuations in the
Corbino-Disk Superconductork
AIP Conf. Proc. 85 (2006) 847-848.
- S. Okuma
Unusual vortex dynamics in the quantum-liquid phase of
a-MoxSi1-x
films.
Proc. 10th International Vortex State Studies Workshop, Mumbai,
India, 2005 (Invited participant), Pram. J. Phys. 66
(2006) 261-269.
- S. Okuma, K. Kainuma, and T. Kishimoto., and M.
Kohara
Flux-flow noise driven by quantum fluctuations in a thick
amorphous film
Physica C 445 (2006) 210-213.
- S. Okuma, T. Kishimoto, and K. Kainuma
Vortex dynamics in two-dimensional amorphous films without edge
effects
Physica C 445 (2006) 240-244.
- S. Okuma, T. Kishimoto, and K. Kainuma
Electronic Transport and Vortex Dynamics in the Low-Temperature
Liquid Phase of an Ultrathin Corbino Disk
Physica C 437 (2006) 247-250.
- S. Okuma, M. Kobayashi, and M. Kamada
Anomalous Vortex Motion in the Quantum-Liquid Phase of
a-MoxSi1-x
Films
Phys. Rev. Lett. 94 (2005) 047003.
(Selected for the Virtual Journal of Applications of
Superconductivity 8 (2005))
- E. Saitoh, K. Harii, H. Miyajima, T. Yamaoka, and S.
Okuma
Critical Phenomena in Chiral Symmetry Breakdown of Micromagnetic
Configurations in an Nanostructured Ferromagnetic Ring
Phys. Rev. B 71 (2005) 172406 (4 pages)
- S. Okuma, M. Kobayashi, K. Kainuma, and M. Morita
Anomalous vortex dynamics in the low-temperature liquid phase of a
thin
a-MoxSi1-x
film
Physica C 426 (2005) 23-27.
- S. Okuma, S. Morishima, and M. Kamada
Large vortex-density fluctuations induced by current in the
Corbino disk
Physica C 426 (2005) 158-162.
- S. Okuma and S. Morishima
Current-driven Large Density Fluctuations of Vortices and
Antivortices in the Corbino Disk
Proc. 18th International Conference on Noise and Fluctuations
ICNF05, Salamanca, Spain, 2005, AIP Series of Conference
Proceedings (2005) 167-170.
- S. Okuma, K. Kainuma, and T. Kishimoto
Unusual Fluctuations of Flux Flow at Low Temperature in
Superconducting Films.
Proc. 18th International Conference on Noise and Fluctuations
ICNF05, Salamanca, Spain, 2005, AIP Series of Conference
Proceedings (2005) 117-120.
- M. Morita and S. Okuma
Electronic Transport at Low Temperature below the Field-Driven
Superconductor-Insulator Transition in Thin
a-MoxSi1-x
Films
Physica C 426 (2005) 153-157.
- S. Okuma and M. Kamada
Vortex Dynamics and Possible Vortex States just below the
Vortex-Glass Phase
Phys. Rev. B 70 (2004) 014509 (6 pages) .
(Selected for the Virtual Journal of Applications of
Superconductivity 7 (2004))
- S. Okuma and M. Kamada
Current-driven vortex dynamics at zero field in thick and thin
films probed by voltage noise
J. Phys. Soc. Jpn 73 (2004) 2807-2812.
- M. Kamada and S. Okuma
Plastic Motion of Current-Driven Vortex Glass in the Corbino
Disk
J. Phys. Soc. Jpn. 73 (2004) 526-529.
- S. Okuma, M. Kamada, and M. Kobayashi
Crossover from thermal to quantum liquid regime in a thick
amorphous film
Physica C 412 (2004) 539-543. .
- M. Kamada, Y. Watanabe, and S. Okuma
Unusual vortex dynamics in the Meissner phase in the Corbino
disk
Physica C 412 (2004) 535-538.
- S. Okuma, K. Amemori, and S. Togo
Vortex-Glass Transition and Vortex Phase Diagram in Thick
Amorphous MgxB1-x
Films
Proc. 7th Int. Conf. on Materials and Mechanisms of
Superconductivity and High Temperature
Superconductors (M2S-7), Rio de Janeiro, 2003 (Selected as an
oral presentation), Physica C 408-410 (2004) 493-494.
- S. Okuma, F. Saito, K. Amemori, and M. Kobayashi
Critical Dynamics of Vortices near the second-order transition and
quantum fluctuations
Proc. 7th Int. Conf. on Materials and Mechanisms of
Superconductivity and High Temperature
Superconductors (M2S-7), Rio de Janeiro, 2003 , Physica C
408-410 (2004) 589-590.
- M. Kamada and S. Okuma
Dynamics of the Vortex Glass in the Corbino Disk Geometry
Proc. 7th Int. Conf. on Materials and Mechanisms of
Superconductivity and High Temperature
Superconductors (M2S-7), Rio de Janeiro, 2003 , Physica C
408-410 (2004) 597-598.
- S. Okuma, S. Togo, and M. Morita
Enhancement of the Quantum-Liquid Phase by
Increased Resistivity in Thick Amorphous
MoxSi1-x
Films
Phys. Rev. Lett. 91 (2003) 067001(1-4).
- S. Okuma, S. Togo, and K. Amemori
Observation of Superconductivity in Thick
Amorphous MgxB1-x
Films
Phys. Rev. B 67 (2003) 172508.
(Selected for the Virtual Journal of Applications of
Superconductivity 4 (2003))
- S. Okuma, S. Togo, M. Morita, F. Saito, and K.
Amemori
Quantum Fluctuations and Vortex Phase Diagram in Uniformly
Disordered Amorphous Films
Proc. 4th Int. Conf. on New Theories, Discoveries, and
Applications of Superconductors and Relataed Materials(New3SC-4),
San Diego, California, 2003 ( Invited paper );
Int. J. Mod. Phys. B 17 (2003) 3396-3400.
- S. Okuma, S. Togo, and K. Amemori
Superconducting Properties and Possible Vortex Phase Diagram in
Thick Amorphous
MgxB1-x Films
Int. J. Mod. Phys. B 17 (2003) 3688-3693.
- M. Morita and S. Okuma
Magnetoresistance and Current-Induced Vortex Motion at T→0
in Two-Dimensional Vortex Glass
Int. J. Mod. Phys. B 17 (2003) 3445-3448.
- S. Okuma, S. Togo, and K. Amemori
Superconductivity and Vortex States in Thick Amorphous
MgxB1-x Films
Physica C 392 (2003) 336-340.
- S. Okuma, F. Saito, S. Togo, M. Morita, and K.
Amemori
Effects of Disorder and Dimensionality on the Vortex Phase Diagram
at Low Temperature in Amorphous Films
Physica C 392 (2003) 410-413.
- M. Morita and S. Okuma
Magnetoresistance and Vortex States below the 2D
Superconductor-Insulator Transition near T=0
Physica C 392 (2003) 406-409.
- M. Kamada, Y. Arakawa, and S. Okuma
I-V Characteristics of Thick
a-MoxSi1-x
Films in the Corbino Disk Geometry
Physica C 392 (2003) 424-427.
- S. Okuma and M. Kamada
Dynamics of Current-Driven Vortex Glass Probed by Voltage
Noise
Proc. 17th International Conference on Noise and Fluctuations
ICNF03, Prague, Czech Republic, 2003, (Selected as an oral
presentation) pp.179-182 .
- S. Okuma, F. Saito, and M. Morita
Suppression of the Vortex-Glass Phase in Quasi-2D
a-MoxSi1-x
Films
J. Low Temp. Phys. 131 (2003) 1019-1023.
- S. Okuma, S. Togo, D. Sanno, K. Amemori and M.
Morita
Superconducting Properties in Amorphous
MgxB1-x Films
J. Low Temp. Phys. 131 (2003) 1111-1115.
- S. Okuma, S. Togo, and M. Morita
Vortex States at Low Temperature and Disorder in Thick
a-MoxSi1-x
Films
Proc. LT 23 (Hiroshima, 2002); Physica B 329-333 (2003)
1389-1390.
- M. Morita and S. Okuma
Anomalous Magnetoresistance below the 2D Superconductor-Insulator
Transition
Proc. LT 23 (Hiroshima, 2002); Physica B 329-333 (2003)
1393-1394.
- M. Kamada and S. Okuma
Vortex States just below the Vortex-Glass Phase Probed by Voltage
Noise
Proc. LT 23 (Hiroshima, 2002); Physica C 388-389 (2003)
783-784.
- S. Okuma, M. Morita, and Y. Imamoto
Vortex Phase Diagram and Quantum Fluctuations in
Thick
a-MoxSi1-x
Films
Phys. Rev. B 66 (2002) 104506 (8 pages) (regular article).
- S. Okuma, S. Togo, Y. Imamoto, and F. Saito
Quantum Liquid of Vortices at T = 0 in Thick
a-MoxSi1-x
Films
Physica C 378-381 (2002) 453-456.
- M. Morita and S. Okuma
Anisotropic Magnetoresistance on the Insulating Side of the
Zero-Field Superconductor-Insulator Transition
Physica C 378-381 (2002) 598-601.
- M. Kamada, Y. Ogawa, and S. Okuma
Voltage Noise near the Vortex-Liquid-Vortex-Glass Boundary
Physica C 378-381 (2002) 602-606.
- 大熊 哲, 森田真規子
乱れた超伝導体の極低温ボルテックス状態と超伝導絶縁体転移
固体物理 37 (2002) 805-816.
- S. Okuma, Y. Imamoto, and M. Morita
Vortex Glass Transition and Quantum Vortex Liquid
at Low Temperature in a Thick
a-MoxSi1-x
Film
Phys. Rev. Lett. 86 (2001) 3136-3139 .
- S. Okuma, S. Shinozaki, and M. Morita
Electronic Transport and Possible Vortex States at
T=0 in Highly Disordered Ultrathin Films of
a-MoxSi1-x
Phys. Rev. B 63 (2001) 54523 (regular article).
- S. Okuma and M. Morita
Vortex States at Low Temperature in Disordered Thin and Thick
Films of
a-MoxSi1-x
Proc. 2nd Int. Conf. on Mesoscopic and Strongly Correlated
Electron Systems, Moscow, Russia (Invited paper), Phys.
Uspekhi (2001) 108-113.
- S. Okuma and M. Morita
Possible Vortex Phase Diagram at Zero Temperature in Disordered 2D
Superconductors
Physica C 357 (2001) 556-559.
- S. Okuma, M. Kamada and N. Kokubo
Current-Induced Voltage Noise at Zero Field in Thick and Thin
Films of
a-MoxSi1-x
Physica C 357 (2001) 560-563.
- S. Okuma, Y. Imamoto, and M. Morita
Observation of the Vortex-Glass Transition in the Low-Temperature
High-Field Regime in Thick
a-MoxSi1-x
Films
Physica C 357 (2001) 466-468.
- M. Morita and S. Okuma
Vortrex States at T =0 in Disordered Thin and Thick Films
of
a-MoxSi1-x
Physica C 364 (2001) 530-533.
- M. Kamada and S. Okuma
Vortex Dynamics near Zero Field in 3D and 2D Superconductors
Physica C 364 (2001) 522-525.
- S. Okuma, Y. Imamoto, and M. Morita
Evidence for the Quantum Vortex Liquid Phase in Thick
a-MoxSi1-x
Films
Physica C 364 (2001) 526-529.
- S. Okuma and M. Kamada
Current-Induced Voltage Noise and Vortex Dynamics in Thick
a-MoxSi1-x
Films
Proc. 16th International Conference on Noise in Physical
Systems and 1/f Fluctuations ICNF, Florida, USA 2001 (Selected
as an oral presentation), pp.59-62.
- M. Kamada and S. Okuma
Voltage Fluctuations Associated with Unbinding of Vortex Pairs in
the Presence of Current
Proc. 16th International Conference on Noise in Physical
Systems and 1/f Fluctuations ICNF, Florida, USA 2001 (Selected
as an oral presentation), pp.55-58.
- S. Okuma and N. Kokubo
Vortex Dynamics in Amorphous
MoxSi1-x Films
Detected by Voltage Noise
Phys. Rev. B 61 (2000) 671-677.
- S. Okuma and M. Arai
Evidence of the Vortex-Glass Transition in
Homogeneously Disordered Thick Films of
a-MoxSi1-x
J. Phys. Soc. Jpn. 69 (2000) 2747-2750.
- S. Okuma, N. Kokubo, and M. Kamada
Vortex Dynamics below the Kosterlitz-Thouless Transition Detected
by Voltage Noise
Proc. 12th Int. Symp. on Superconductivity (2000)
pp.296-298. (Selected as an oral presentation)
- S. Okuma, S. Shinozaki, and M. Morita
Magnetoresistance and Vortex States near the
Superconductor-Insulator Transition in
a-MoxSi1-x
Films
Proc. 12th Int. Symp. on Superconductivity (2000)
pp.398-400.
- S. Okuma, M. Arai, and N. Kokubo
Vortex Phase Diagram of Disordered Films of Granular In and
Amorphous
a-MoxSi1-x
Physica B 284-288 (2000) 640-641.
- N. Kokubo and S. Okuma
Vortex Dynamics in the Mixed State of Amorphous
a-MoxSi1-x
Films
Physica B 284-288 (2000) 865-866.
- N. Kokubo, M. Mutou, M. Kamada, and S. Okuma
Current-Induced Voltage Noise below the Kosterlitz-Thouless
Transition
Physica B 284-288 (2000) 981-982.
- S. Okuma, M.Arai, and N. Kokubo
The Vortex-Glass Transition and Phase Diagram in Low-TC
Superconductors
Advances in Superconductivity XI 1 (Springer-Verlag, Tokyo, 1999)
203-206. (Selected as an oral presentation at 11th Int. Symp.
on Superconductivity )
- S. Okuma, S.Shinozaki, and N.Kokubo
The T=0 Phase Diagram of the Field-Driven
Superconductor-Insulator Transition in 2D
Advances in Superconductivity XI 1 (Springer-Verlag, Tokyo, 1999)
185-188.
- N. Kokubo M. Muto, and S. Okuma
The Thermally Nucleated Dissipation Process in Zero Field
Studied by Voltage Noise
Advances in Superconductivity XI 1 (Springer-Verlag, Tokyo, 1999)
299-302 .
- N. Kokubo and S. Okuma
Dynamical Properties of Vortices in the Mixed State of Amorphous
a-MoxSi1-x
Advances in Superconductivity XI 1 (Springer-Verlag, Tokyo, 1999)
295-298.
- S. Okuma, T. Terashima, and N. Kokubo
Anomalous Magnetoresistance near the
Superconductor-Insulator Transition in Ultrathin Films of
a-MoxSi1-x
Phys. Rev. B 58 (1998) 2816-2819.
- S. Okuma, T. Terashima, and N. Kokubo
Superconductor-Insulator Transition Driven by
Magnetic-Field and Disorder in Two-Dimensional
MoxSi1-x
Films
Solid State Commun. 106 (1998) 529-533.
- N. Kokubo, T. Terashima, and S. Okuma
Voltage Noise of an Amorphous
MoxSi1-x Film near
the Superconducting Transition in Magnetic Fields
J. Phys. Soc. Jpn. 67 (1998) 725-728.
- S. Okuma, T. Terashima, and N. Kokubo
Superconductor-Insulator Transition in Two-Dimensional
a-MoxSi1-x
Films
Advances in Superconductivity X 1 (Springer-Verlag, 1998)
163-166.
- S. Okuma, T. Ito, and N. Kokubo
Frequency Dependence of the Complex Resistivity in the Vortex
State
Advances in Superconductivity X 1 (Springer-Verlag, 1998)
75-78.
- N. Kokubo, T. Terashima, and S. Okuma
Voltage Noise Measurements in Dirty Superconducting Films
Advances in Superconductivity X 1 (Springer-Verlag, 1998)
79-82.
- S. Okuma and N. Kokubo
Scaling Behavior of the Longitudinal and Hall
Resistivities in Indium Films
Phys. Rev. B 56 (1997) 410-415.
- S. Okuma and N. Kokubo
Universal Critical Scaling of dc and ac Complex
Resistivities in an Indium Film near the Vortex-Glass
Transition
Phys. Rev. B 56 (1997) 14138-14142.
- 大熊 哲、小久保伸人
極低温下水晶振動子法による膜厚・吸着原子の測定
固体物理 32 (1997) 97-103.
- S. Okuma and N. Kokubo
Hall Effect in the Mixed State of In Films
Advances in Superconductivity IX 1 (Springer-Verlag, 1997)
93-96.
- S. Okuma, T. Terashima, and N. Kokubo
Superconductor-Insulator Transition in Uniformly Disordered
Two-Dimensional Films
Advances in Superconductivity IX 1 (Springer-Verlag, 1997)
191-194.
- S. Okuma, H. Yoshida, T. Ito, and N. Kokubo
Ac Magnetic and Mechanical Response at the Onset of
Superconductivity in Magnetic Fields
Advances in Superconductivity IX 1 (Springer-Verlag, 1997)
199-202.
- N. Kokubo and S. Okuma
Critical Scaling Behavior in the Ac Impedance of Indium Films
in Magnetic Fields
Advances in Superconductivity IX 1 (Springer-Verlag, 1997)
195-198.
- S. Okuma and H. Hirai
Scaling of Current-Resistivity Isotherms of Indium Films in a
Magnetic Field
Physica B 228 (1996) 272-278.
- S. Okuma and T. Arai
Quantum Fluctuations of the Phase near the S-I Transition in
2D
Advances in Superconductivity VIII 1 (Springer-Verlag, 1996)
53-56.
- S. Okuma and H. Hirai
The Vortex-Glass Transition in Low Temperature Superconductors
Advances in Superconductivity VIII 1 (Springer-Verlag, 1996)
541-544.
- S. Okuma and N. Kokubo
Unusual Insulating Phase at Low Temperature in
Thin Indium Films
Phys. Rev. B 51 (1995) 15415-15419.
- S. Okuma, K. Enya and H. Hirai
Dimensionality Crossover of the Nonlinear
Resistance in Quench-Condensed Indium Films
J. Phys. Soc. Jpn. 64 (1995) 3397-3402.
- S. Okuma and N. Kokubo
Field-Induced Superconductor-Insulator Transition and Grain Size
in Thin Granular Films of Indium
Solid State Commun. 93 (1995) 1019-1023.
その他
- 大熊 哲
会議だより 第12回渦糸物理国際ワークショップ(Vortex2009)
固体物理 45 (2010) 55-61.
- 大熊 哲
第22回国際超電導シンポジウム(ISS2009)トピックス:物理化学分野 \\
超電導Web21, 2009年12月号 pp3-4.
S. Okuma
Feature Article: ISS2009 Topics -Physics and Chemistry-
Superconductivity Web21, Spring Issue, (15 April) (2010) pp 11-12
- 大熊 哲
極低温蒸着装置を用いた2次元超伝導体の研究
東京大学低温センターだより 19 (1995) 5-13.
- 小久保伸人(大熊研/学振DC)
2次元超伝導体における磁場印加超伝導絶縁体転移(修士論文全文掲載)
物性研究 64 (1995) 282-307.
- 森田真規子(大熊研/学振DC)
乱れたアモルファス超伝導薄膜の極低温における輸送現象と磁束状態(修士論文全文掲載)
物性研究 77 (2001) 113-152.
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Okuma
Lab, Tokyo Institute of Technology