村木康二 (NTT物性科学基礎研究所)

Japanese/English

		村木康二（むらきこうじ） ― 上席特別研究員 ―
		NTT物性科学基礎研究所量子固体物性研究グループ〒243-0198 神奈川県厚木市森の里若宮３－１ E-mail: koji.muraki.mnhco.ntt.co.jp
		1994.4-現在	NTT物性科学基礎研究所
		2001.8-2002.3	ドイツ・マックスプランク固体物性研究所客員研究員
		1994.3	博士（工学）、東京大学

What's New

英語のページをご覧下さい。

Research Interests

物質のトポロジカルな性質によって現れる量子効果
半導体ナノ構造における電子相関／量子コヒーレンス
量子ホール系における多体効果
Disorderと相互作用の競合
ヘテロ構造の設計・成長・加工による２次元電子系の物性制御

Selected Publications

Full List of Publications (Since 1992)

Counterflowing edge current and its equilibration in quantum Hall devices with sharp edge potential: Roles of incompressible strips and contact configuration
T. Akiho, H. Irie, K. Onomitsu, and K. Muraki Phys. Phys. B 99, 121303(R) (2019). [abstract]
Landau-Zener-Stuckelberg interference in coherent charge oscillations of a one-electron double quantum dot
Takeshi Ota, Kenichi Hitachi, and Koji Muraki Scientific Reports 8, 5491 (2018). [abstract]
Waveform measurement of charge- and spin-densitywavepackets in a chiral Tomonaga-Luttinger liquid
M. Hashisaka, N. Hiyama, T. Akiho, K. Muraki and T. Fujisawa Nature Physics 13, 559 (2017). [abstract]
Engineering quantum spin Hall insulators by strained-layer heterostructures
T. Akiho, F. Couedo, H. Irie, K. Suzuki, K. Onomitsu, and K. Muraki Appl. Phys. Lett. 109, 192105 (2016). [abstract]
Single-edge transport in an InAs/GaSb quantum spin Hall insulator
Francois Couedo, Hiroshi Irie, Kyoichi Suzuki, Koji Onomitsu, and Koji Muraki Phys. Rev. B 94, 035301 (2016). [abstract]
NMR probing of spin and charge order near odd-integer filling in the second Landau level
T. D. Rhone, L. Tiemann, and K. Muraki Phys. Rev. B 92, 041301(R) (2015). [abstract]
Gate-controlled semimetal-topological insulator transition in an InAs/GaSb heterostructure
Kyoichi Suzuki, Yuichi Harada, Koji Onomitsu, and Koji Muraki Phys. Rev. B 91, 245309 (2015). [abstract]
NMR profiling of quantum electron solids in high magnetic fields
L. Tiemann (), T. D. Rhone (), N. Shibata, and K. Muraki (* equal contribution) Nature Physics 10, 648-652 (2014). [abstract] (published online, Jul. 20, 2014)
ν = 5/2 fractional quantum Hall state in low-mobility electron systems: Different roles of disorder
Gerardo Gamez and Koji Muraki Phys. Rev. B 88, 075308 (2013). [abstract]
Edge channel transport in the InAs/GaSb topological insulating phase
Kyoichi Suzuki, Yuichi Harada, Koji Onomitsu, and Koji Muraki Phys. Rev. B 87, 235311 (2013). [abstract]
Real-space imaging of fractional quantum Hall liquids
Junichiro Hayakawa, Koji Muraki, and Go Yusa Nature Nanotechnology 8, 31 (2013). [abstract] (published online, Dec. 2, 2012)
Impact of graphene quantum capacitance on transport spectroscopy
K. Takase, S. Tanabe, S. Sasaki, H. Hibino, and K. Muraki Phys. Rev. B 86, 165435 (2012). [abstract]
Unraveling the Spin Polarization of the ν = 5/2 Fractional Quantum Hall State
L. Tiemann, G. Gamez, N. Kumada, and K. Muraki Science 335, 828 (2012). [abstract] (published online January 26 2012, Science Express)
Observation of hysteretic transport due to dynamic nuclear spin polarization in a GaAs lateral double quantum dot
T. Kobayashi, K. Hitachi, S. Sasaki, and K. Muraki Phys. Rev. Lett. 107, 216802 (2011). [abstract]
Intrinsic Gap and Exciton Condensation in the νT=1 Bilayer System
P. Giudici, K. Muraki, N. Kumada, and T. Fujisawa Phys. Rev. Lett. 104, 056802 (2010). [abstract]
Spin-Dependent Phase Diagram of the nu_T=1 Bilayer Electron System
P. Giudici, K. Muraki, N. Kumada, Y. Hirayama, and T. Fujisawa Phys. Rev. Lett. 100, 106803 (2008). [abstract]
NMR Evidence for Spin Canting in a Bilayer nu = 2 Quantum Hall System
N. Kumada, K. Muraki , and Y. Hirayama Phys. Rev. Lett. 99, 076805 (2007). [abstract]
Low-Frequency Spin Dynamics in a Canted Antiferromagnet
N. Kumada, K. Muraki , and Y. Hirayama Science 313, 329 (2006). [abstract]
Spin Degree of Freedom in the nu = 1 Bilayer Electron System Investigated by Nuclear Spin Relaxation
N. Kumada, K. Muraki, K. Hashimoto, and Y. Hirayama Phys. Rev. Lett 94, 096802 (2005). [abstract]
Controlled Multiple Quantum Coherences of Nuclear Spins in a Nonometre-Scale Device
G. Yusa, K. Muraki, K. Takashina, K. Hashimoto, and Y. Hirayama Nature 434, 1001 (2005). [abstract]
Effects of Inversion Asymmetry on Electron-Nuclear Spin Coupling in Semiconductor Heterostructures: Possible role of spin-orbit interactions
K. Hashimoto, K. Muraki, N. Kumada, T. Saku, and Y. Hirayama Phys. Rev. Lett 94, 146601 (2005). [abstract]
Coulomb Drag as a Probe of the Nature of Compressible States in a Magnetic Field
K. Muraki, J. G. S. Lok, S. Kraus, W. Dietsche, K. von Klitzing, D. Schuh, M. Bichler, W. Wegscheider Phys. Rev. Lett. 92, 246801 (2004). [abstract]
Electrically Controlled Nuclear Spin Polarization and Relaxation by Quantum Hall States
K. Hashimoto, K. Muraki, T. Saku, and Y. Hirayama Phys. Rev. Lett. 88, 176601 (2002). [abstract]
Charge Excitations in Easy-Axis and Easy-Plane Quantum Hall Ferromagnets
K. Muraki, T. Saku, and Y. Hirayama Phys. Rev. Lett. 87, 196801 (2001). [abstract]
Spin Transition of a Two-Dimensional Hole System in the Fractional Quantum Hall Effect
K. Muraki and Y. Hirayama Phys. Rev. B 59, R2502 (1999). [abstract]
Effect of Valence Band Structure on the Fractional Quantum Hall Effect of Two-Dimensional Hole Systems
K. Muraki and Y. Hirayama Physica B 249, 65 (1998).
Fermi-Level Effect on Ga Self-Diffusion Studied Using (69)GaAs/(69)Ga(71)GaAs Isotope Superlattice
K. Muraki and Y. Horikoshi Inst. Phys. Conf. 145, 547 (1996).
Evidence for Resonant Electron Capture and Charge Buildup in AlGaAs/GaAs Quantum Wells
K. Muraki, A. Fujiwara, S. Fukatsu, Y. Shiraki, and Y. Takahashi Phys. Rev. B 53, 15 477 (1996). [abstract]
Surface Segregation of In Atoms and its Influence on the Energy Levels in InGaAs/GaAs Quantum Wells
K. Muraki, S. Fukatsu, Y. Shiraki, and R. Ito Appl. Phys. Lett. 61, 557 (1992). [abstract]

全論文リスト (Since 1992)

Invited Talks

Quantum Transport in 2D Systems, Luchon, May 2015;
-Probing and controlling disorder effects for the studies of fractional quantum Hall effects
物性談話会, 名古屋大学, 2015年;
-ν=5/2分数量子ホール効果とマヨラナフェルミオン
DiRT2D 2015: Disorder and its Role in Transport in 2D Systems, Okinawa, January 2015;
-Probing disorder and nonlinear screening in quantum Hall systems using NMR
Mauterndorf Winterschool 2014;
-Imaging fractional quantum Hall liquids and controlling disorder effects on the 5/2 state
「対称性の破れた凝縮系におけるトポロジカル量子現象」第４回領域研究会, 名古屋大学, 2013年;
-Edge transport in the InAs/GaSb topological insulating phase
Solid State Devices and Materials (SSDM) 2013, Fukuoka, September 2013;
-Resistively Detected NMR Study of Correlated Electrons in a GaAs Quantum Well:fractional quantum Hall states and more
The 20th Int. Conf. on the Electronic Properties of Two-Dimensional Systems (EP2DS-20), Wroclaw, July 2013;
-NMR probing of fractional quantum Hall liquid and Wigner solid phases
Symposium on Quantum Hall Effects and Related Topics, Stuttgart, June 2013;
-NMR Spectroscopy of FQH Liquid and Solid Phases in the First and Second Landau Levels
2013 Aspen Winter Conference "Topological States of Matter";
-NMR study of nu = 5/2 FQHE and other correlated states
Topological Quantum Phenomena 2012 (TQP2012), Nagoya, May 2012;
-NMR investigation of the nu = 5/2 fractional quantum Hall state
「対称性の破れた凝縮系におけるトポロジカル量子現象」第２回領域研究会, 岡山大学, 2011年;
-nu = 5/2 fractional quantum Hall state as a candidate for non-Abelian state of matter
Station Q Fall Meeting, Kavli Institute for Theoretical Physics, UCSB, Santa Barbara, December 2011;
-NMR measurement of the spin polarization in the nu=5/2 fractional quantum Hall state and in the N=1 Landau level
日本物理学会2010年秋季大会シンポジウム講演, 大阪府立大学;
-量子ホール強磁性: 量子ホール系を通して見るスピン物性
Emerging Phenomena in Quantum Hall Systems (EPQHS3), Lucca, Italy, 2009;
-New lights on the ground-state phase diagrams of bilayer electron systems
APS March Meeting, Pittsburgh, 2009;
-"Spin-dependent phase diagram in bilayer 2D electron systems"
The 18th Int. Conf. on High Magnetic Fields in Semiconductor Physics (HMF18), Sao Pedro, Brazil, 2008;
-"Spin Effects in the Phase Transition of the nu_T=1 Bilayer Electron System "
Device and Process Technologies for Microelectronics, MEMS, Photonics, and Nanotechnology IV, Canberra, 2007;
-"Nuclear spin manipulation in semiconductor nanostructures"
APS March Meeting, Denver, 2007;
-"Low-frequency spin dynamics in a quantum Hall canted antiferromagnet"
Interactions, Excitations, and Broken Symmetry in Quantum Hall Systems (QHSyst06), Dresden, 2006;
-"Spin/charge fluctuations in quantum Hall bilayers -Nuclear spin relaxation and Coulomb drag"
The 17th Int. Conf. on High Magnetic Fields in Semiconductor Physics (HMF17), Wuerzburg, 2006;
-"Electron-nuclear spin interaction in quantum wells "
The 23th Int. Conf. Low Temperature Physics (LT23), Hiroshima, 2002;
-"Charge excitation and transport in pseudospin quantum Hall ferromagnets "

日本語での出版物

「ν=5/2分数量子ホール効果の基底状態と準粒子」
　村木康二, 『固体物理』 Vol. 49 No.1 (通巻575号)

「トポロジカル相と準粒子の組みひも」（翻訳）『パリティ』 2013年06月号 Vol.28, No.06

「第19回「強磁場の半導体物理およびナノテクノロジーへの応用」国際会議(HMF-19)」
　村木康二, 『固体物理』 No.2 (通巻540号)

「NMRによる量子ホール傾角反強磁性状態におけるゴールドストーンモードの観測」
　熊田倫雄・村木康二・平山祥郎, 『固体物理』 Vol. 42 No.9 (通巻499号)

「量子ホール効果とスピン：ランダウ準位交差における Ising 量子ホール強磁性と電子スピン-核スピン相互作用」
　村木康二・橋本克之・平山祥郎, 『固体物理』 No.6 (通巻448号)

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