Research Papers

The main papers published since 2006 are listed.

2021-22

Daiju Terasawa, Shota Norimoto, Tomonori Arakawa, Meydi Ferrier, Akira Fukuda, Kensuke Kobayashi, and Yoshiro Hirayama, “Large Zeeman Splitting in Out-of-Plane Magnetic Field in a Double-Layer Quantum Point Contact”, J. Phys. Soc. Japan 90, 024709-1-6 (2021). https://doi.org/10.7566/JPSJ.90.024709
Y. H. Wang, K. Hashimoto, T. Tomimatsu, and Y. Hirayama, “Imaging disorder-induced scattering centers in quantum Hall incompressible strip”, Phys. Rev. B103, 085308-1-5 (2021). https://doi.org/10.1103/PhysRevB.103.085308
M. H. Fauzi, William J. Munro, Kae Nemoto, and Y. Hirayama, “Double nuclear spin relaxation in hybrid quantum Hall systems”, Phys. Rev. B Letter, B104, L121402-1-6 (2021). DOI: 10.1103/PhysRevB.104.L121402
Kaifeng Yang, Katsumi Nagase, Yoshiro Hirayama, Tetsuya D. Mishima, Michael B. Santos, and Hongwu Liu, “Wigner solids of domain wall skyrmions”, Nature Communications 12:6006, pp1-7 (2021). https://doi.org/10.1038/s41467-021-26306-8
Mohammad H. Fauzi, Takeshi Sobue, Annisa Noorhidayati, Ken Sato, Katsushi Hashimoto, Yoshiro Hirayama, “Resistively Detected NMR Lineshapes in a Local Filling 𝜈 (less than) 1 Quantum Hall Breakdown”, Physica Status Solidi B (60 years of pss), 2100504-1-7 (2021). https://doi.org/10.1002/pssb.202100504
Shaoqing Du, Yoshifumi Hashikawa, Haruka Ito, Katsushi Hashimoto, Yasujiro Murata, Yoshiro Hirayama, and Kazuhiko Hirakawa, "Inelastic Electron Transport and Ortho−Para Fluctuation of Water Molecule in H2O@C60 Single Molecule Transistors”, Nano Letters, 21, 10346-10353 (2021). https://doi.org/10.1021/acs.nanolett.1c03604
Yasuaki Hayafuchi, Ryota Konno, Annisa Noorhidayati, Mohammad Hamzah Fauzi, Naokazu Shibata, Katsushi Hashimoto, and Yoshiro Hirayama, “Even-denominator fractional quantum Hall state in conventional triple-gated quantum point contact”, Applied Physics Express 15, 025002-1-5 (2022). https://doi.org/10.35848/1882-0786/ac4c35

2020

Annisa Noorhidayati, Mohammad Hamzah Fauzi, Muhammad Fauzi Sahdan, Shunta Maeda, Ken Sato, Katsumi Nagase, and Yoshiro Hirayama, “Resistively detected NMR in a triple-gate quantum point contact: Magnetic field dependence”, Phys. Rev. B101, 035425-1-6 (2020). https://doi.org/10.1103/PhysRevB.101.035425
T. Tomimatsu, K. Hashimoto, S. Taninaka, S. Nomura, and Y. Hirayama, “Probing weak breakdown of the topological protection: Filling-factor-dependent evolution of robust quantum Hall incompressible phases”, Physical Review Research 2, 013128-1-6 (2020). DOI: 10.1103/PhysRevResearch.2.013128
D. Terasawa, S. Norimoto, T. Arakawa, M. Ferrier, A. Fukuda, K. Kobayashi, and Y. Hirayama, “Conductance quantization and shot noise of a double-layer quantum point contact”, Phys. Rev. B101, 115401-1-13 (2020). DOI: 10.1103/PhysRevB.101.115401
Susumu Sasaki, Takanori Miura, Kosuke Ikeda, Masahiro Sakai, Takuya Sekikawa, Masaki Saito, Tatsuro Yuge, and Yoshiro Hirayama, “1/f2 spectra of decoherence noise on 75As nuclear spins in bulk GaAs”, Scientific Reports 10: 10674-1-9 (2020). https://doi.org/10.1038/s41598-020-67636-9
T. Aono, M. Takahashi, M. H. Fauzi, and Y. Hirayama, “Quantum point contact potential curvature under correlated disorder potentials”, Phys. Rev. B102, 045305-1-12 (2020). https://doi.org/10.1103/PhysRevB.102.045305
Kenji Shibata, Matija Karalic, Christopher Mittag, Thomas Tschirky, Christian Reichl, Hiromu Ito, Katsushi Hashimoto, Toru Tomimatsu, Yoshiro Hirayama, Werner Wegscheider, Thomas Ihn, and Klaus Ensslin, “Magnetotransport of electrically induced two-dimensional hole gases in undoped GaSb quantum wells”, Phys. Rev. Research 2, 033383-1-6 (2020). DOI:10.1103/PhysRevResearch.2.033383

2019

K. Shibata, M. Karalic, C. Mittag, T. Tschirky, C. Reichl, H. Ito, K. Hashimoto, T. Tomimatsu, Y. Hirayama, W. Wegscheider, T. Ihn, and K. Ensslin, “Electric-field-induced two-dimensional hole gas in undoped GaSb quantum wells”, Appl. Phys. Lett. 114, 232102 (2019). https://doi.org/10.1063/1.5093133
K. F. Yang, M. M. Uddin, K. Nagase, T. D. Mishima, M. B. Santos, Y. Hirayama, Z. N. Yang and H. W. Liu, “Pump-probe nuclear spin relaxation study of the quantum Hall ferromagnet at filling factor ν=2”, New Journal of Physics 21, 083004 (2019). https://doi.org/10.1088/1367-2630/ab34ce
M. H. Fauzi, M. F. Sahdan, M. Takahashi, A. Basak, K. Sato, K. Nagase, B. Muralidharan, and Y. Hirayama, “Probing strain modulation in a gate-defined one-dimensional electron system”, Phys. Rev. B100 (RC), 241301(R)-1-5 (2019). DOI: 10.1103/PhysRevB.100.241301
Sergei Studenikin, Marek Korkusinski, Motoi Takahashi, Jordan Ducatel, Aviv Padawer-Blatt, Alex Bogan, D. Guy Austing, Louis Gaudreau, Piotr Zawadzki, Andrew Sachrajda, Yoshiro Hirayama, Lisa Tracy, John Reno, and Terry Hargett, “Electrically tunable effective g-factor of a single hole in a lateral GaAs/AlGaAs quantum dot”, Nature Communication Physics, 2, 159-1-8 (2019). https://doi.org/10.1038/s42005-019-0262-1

2018

T. Masuda, K. Sekine, K. Nagase, K. S. Wickramasinghe, T. D. Mishima, M. B. Santos, and Y. Hirayama, "Transport characteristics of InSb trench-type in-plane gate quantum point contact" Appl. Phys. Lett. 112, 192103 (2018), doi: 10.1063/1.5023836
M. H. Fauzi, A. Noorhidayati, M. F. Sahdan, K. Sato, K. Nagase, and Y. Hirayama, "Dynamic nuclear polarization at high Landau levels in a quantum point contact", Phys. Rev. B 97, 201412(R)(2018), doi: 10.1103/PhysRevB.97.201412
Katsushi Hashimoto, Toru Tomimatsu, Ken Sato and Yoshiro Hirayama, "Scanning nuclear resonance imaging of a hyperfine-coupled quantum Hall system", Nature Communications 9, 2215 (2018), doi:10.1038/s41467-018-04612-y

2017

M. Korkusinski, P. Hawrylak, H. W. Liu, and Y. Hirayama, “Manipulation of a Nuclear Spin by a Magnetic Domain Wall in a Quantum Hall Ferromagnet”, Scientific Reports, 7, 43553 (2017). 7:43553, pp.1-7, doi: 10.1038/srep43553 (2017).
A. Singha, M. H. Fauzi, Y. Hirayama, and B. Muralidharan, “Landauer-Buttiker approach for hyperfine mediated electronic transport in the integer quantum Hall regime”, Phys. Rev. B95, 115416-1-17 (2017).
A. Srinivasan, D. S. Miserev, K. L. Hudson, O. Klochan, K. Muraki, Y. Hirayama, D. Reuter, A. D. Wieck, O. P. Sushkov, and A. R. Hamilton, “Detection and Control of Spin-Orbit Interactions in a GaAs Hole Quantum Point Contact”, Phys. Rev. Lett. 118, 146801-1-5 (2017).
Kaifeng Yang, Katsumi Nagase, Yoshiro Hirayama, Tetsuya D. Mishima, Michael B. Santos, and Hongwu Liu, “Role of chiral quantum Hall edge states in nuclear spin polarization”, Nature Communications 8:15084, pp.1-7, doi: 10.1038/ncomms15084 (2017).
M. H. Fauzi, A. Singha, M. F. Sahdan, M. Takahashi, K. Sato, K. Nagase, B. Muralidharan, and Y. Hirayama, “Resistively detected NMR line shapes in a quasi-one-dimensional electron system”, Phys. Rev. B95 (RC), 241404-1-5 (2017).

2016

Y. Hama, M. H. Fauzi, K. Nemoto, Y. Hirayama, and Z. F. Ezawa, “Dicke model for quantum Hall systems”, New Journal of Physics, 18, 023027 (2016).
S. Miyamoto, T. Miura, S. Watanabe, K. Nagase, and Y. Hirayama, “Localized NMR Mediated by Electrical-Field-Induced Domain Wall Oscillation in Quantum-Hall-Ferromagnet Nanowire”, Nano Letters 16, 1596-1601 (2016).
A. Srinivasan, K. L. Hudson, D. Miserev, L. A. Yeoh, O. Klochan, K. Muraki, Y. Hirayama, O. P. Sushkov, and A. R. Hamilton, “Electrical control of the sign of the g factor in a GaAs hole quantum point contact”, Phys. Rev. B (RC) B94, 041406-1-5 (2016).
K. Hashimoto, T. Tomimatsu, S. Shirai, S. Taninaka, K. Nagase, K. Sato, and Y. Hirayama, “Scanning nuclear electric resonance microscopy using quantum-Hall-effect breakdown”, AIP Advances 6, 075024-1-6 (2016).
Keiichirou Akiba, Katsumi Nagase, and Yoshiro Hirayama, “Simultaneous measurement of resistively and optically detected nuclear magnetic resonance in the ν=2/3 fractional quantum Hall regime”, Phys. Rev. B94 (RC), 081104-1-5 (2016).
S. Maeda, S. Miyamoto, M. H. Fauzi, K. Nagase, K. Sato, and Y. Hirayama, “Fabry-Perot interference in a triple-gated quantum point contact”, Appl. Phys. Lett., 109, 143509-1-4 (2016).

2015

Michihisa Yamamoto, Yasuhiro Tokura, Yoshiro Hirayama, and Seigo Tarucha1, “Band Shift, Band Filling and Electron Localization in a Quantum Wire Detected via Tunneling between Parallel Quantum Wires”, J. Phys. Soc. Japan (Letters) 84, 033710-1-4 (2015).
T. Hatano, W. Kume, S. Watanabe, K. Akiba, K. Nagase, and Y. Hirayama, “Anisotropic nuclear-spin diffusion in double quantum wells”, Phys. Rev. B91, 115318-1-7 (2015).
Todd Karin, Russell J. Barbour, Charles Santori, Yoshihisa Yamamoto, Yoshiro Hirayama, and Kai-Mei C. Fu, “Radiative properties of multicarrier bound excitons in GaAs”, Phys. Rev. B91, 165204-1-12 (2015).
Vincent Renard, Benjamin Piot, Xavier Waintal, Geneviève Fleury, David Cooper, Yoshitaka Niida, D. Tregurtha, Akira Fujiwara, Yoshiro Hirayama, and Kei Takashina, "Valley polarisation assisted spin polarisation in two dimensions", Nature Commun. 6:7230, pp 1-8, doi: 10.1038/ncomms8230 (2015).
K. Akiba, S. Kanasugi, T. Yuge, K. Nagase, and Y. Hirayama, “ Optically Induced Nuclear Spin Polarization in the Quantum Hall Regime: The Effect of Electron Spin Polarization through Exciton and Trion Excitations” Phys. Rev. Lett. 115, 026804-1-5 (2015) [editor’s suggestion]
Toru Tomimatsu, Shota Shirai, Katsushi Hashimoto, Ken Sato, and Yoshiro Hirayama, “Comparison of nuclear electric resonance and nuclear magnetic resonance in integer and fractional quantum Hall states”, AIP Advanced 5, 087156-1-6 (2015).
Adam Miranowicz, Sahin K. Ozdemir, Jiri Bajer, Go Yusa, Nobuyuki Imoto, Yoshiro Hirayama, and Franco Nori, “Quantum state tomography of large nuclear spins in a semiconductor quantum well: Optimal robustness against errors as quantified by condition numbers”, Phys. Rev. B92, 075312-1-18 (2015).

2014

S. Nomura, M. Yamaguchi, H. Tamura, T. Akazaki, Y. Hirayama, M. Korkusinski, and P. Hawrylak, “Photoluminescence fine structures in the fractional quantum Hall effect regime”, Phys. Rev. B89, 115317-1-6 (2014).
H. Okamoto, W. Izumida, Y. Hirayama, H. Yamaguchi, A. Riedel, and K.-J. Friedland, “Mechanical resonance characteristics of a cylindrical semiconductor heterostructure containing a high-mobility two-dimensional electron gas”, Phys. Rev. B89, 245304-1-8 (2014).
Amin Vakhshouri1, Katsushi Hashimoto, and Yoshiro Hirayama, “Atomic force microscope-assisted scanning tunneling spectroscopy under ambient conditions”, Miscroscopy 63, 475-479 (2014).
M. H. Fauzi, S. Watanabe, and Y. Hirayama, “Nuclear magnetometry studies of spin dynamics in quantum Hall systems”, Phys. Rev. B 90, 235308-1-8 (2014).

2013

S. Nomura, H. Tamura, M. Yamaguchi, T. Akazaki, and Y. Hirayama, “Exchange energy enhanced g-factors obtained from Landau fan diagrams at low magnetic fields”, Phys. Rev. B 87, 085318-1-6 (2013).
Yoshitaka Niida, Kei Takashina, Yukinori Ono, Akira Fujiwara, and Yoshiro Hirayama, “Electron and hole mobilities at a Si/SiO2 interface with giant valley splitting”, Appl. Phys. Lett. 102, 191603-1-4 (2013).
V. T. Renard, I. Duchemin, Y. Niida, A. Fujiwara, Y. Hirayama, and K. Takashina, “Metallic behaviour in SOI quantum wells with strong intervalley scattering”, Scientific Reports, 3 : 2011-11-5, (2013).
K. Akiba, T. Yuge, S. Kanasugi, K. Nagase, and Y. Hirayama, “Optically induced nuclear spin polarization in a single GaAs/AlGaAs quantum well probed by a resistance detection method in the fractional quantum Hall regime”, Phys. Rev. B87, 235309-1-7 (2013).
S. Ichinokura, T. Hatano, W. Izumida, K. Nagase, and Y. Hirayama, “Electrical control of tunnel coupling between vertically coupled quantum point contacts”, Appl. Phys. Lett. 103, 062106-1-4 (2013).
T. Tomimatsu, K. Hashimoto, K. Sato, and Y. Hirayama, “Pump-probe nuclear magnetic resonance measurement in quantum Hall effect breakdown regime”, Appl. Phys. Lett. 103, 082108-1-4 (2013).
M. M. Uddin, H. W. Liu, K. F. Yang, K. Nagase, K. Sekine, C. K. Gaspe, T. D. Mishima,4 M. B. Santos, and Y. Hirayama, “Gate depletion of an InSb two-dimensional electron gas”, Appl. Phys. Lett. 103, 123502-1-4 (2013).
M. H. Fauzi, S. Watanabe, and Y. Hirayama.“Spin Phase Transition Studies to Probe Spin Dynamics in Quantum Hall System”, J. Phys.: Conf. Ser. 456, 012010 (2013).
K. Takashina, Y. Niida, V. T. Renard, B. A. Piot, D. S. D. Tregurtha, A. Fujiwara, and Y. Hirayama, “Spin and valley polarization dependence of resistivity in two dimensions”, Phys. Rev. B88, 201301-1-5 (RC) (2013).

2012

H. Yamaguchi, H. Okamoto, S. Ishihara, and Y. Hirayama, “Motion detection of a micromechanical cantilever through magneto-piezovoltage in two-dimensional electron systems”, Appl. Phys. Lett. 100, 012106-1-3 (2012).
W. Izumida, Y. Hirayama, H. Okamoto, H. Yamaguchi, and K. –J. Friedland, “Mechanical vibration of a cylindrically rolled-up cantilever shell in microelectromechanical and nanoelectromechanical systems”, Phys. Rev. B85, 075313-1- 10 (2012).
H. W. Liu, K. F. Yang, T. D. Mishima, M. B. Santos, K. Nagase, and Y. Hirayama, "Resistively detected nuclear magnetic resonance:recent developments" Acta Phys. Sin. 61, 147302-1-12 (2012) (invited).
M. H. Fauzi, S. Watanabe, N. Kumada, and Y. Hirayama, “All Electrical Probe of Nuclear Spin Polarization and Relaxation by Spin Phase Transition Peaks of the Filling Fraction ν = 2/3 Quantum Hall Effect”, J. Korean Phys. Soc., 60, 1676 (2012).
K. Hashimoto, T. Champel, S. Florens, C. Sohrmann, J. Wiebe, Y. Hirayama, R. A. Römer, R. Wiesendanger, and M. Morgenstern, “Robust Nodal Structure of Landau Level Wave Functions Revealed by Fourier Transform Scanning Tunneling Spectroscopy”, Phys. Rev. Lett. 109, 116805 (2012).
M. H. Fauzi, S. Watanabe, and Y. Hirayama, "Microscopic Characteristics of Dynamic Nuclear Polarization and Selective Nuclear Depolarization at the ν=2/3 Spin Phase Transition", Appl. Phys. Lett. 101, 162105 (2012).
M. M. Uddin, H. W. Liu, K. F. Yang, K. Nagase, T. D. Mishima, M. B. Santos, and Y. Hirayama, “Characterization of InSb quantum wells with atomic layer deposited gate dielectrics”, Appl. Phys. Lett. 101, 233503 (2012).

2011

Masashi Nishimori, Hirokazu Hasegawa, Susumu Sasaki, Shinji Watanabe and Yoshiro Hirayama “Observation of strains caused by heterostructure interfaces “, Physica Status Solidi (c) 8, 399 (2011)
K. F. Yang, H. W. Liu, K. Nagase, T. D. Mishima, M. B. Santos, and Y. Hirayama, “Resistively detected nuclear magnetic resonance via a single InSb two-dimensional electron gas at high temperature”, Appl. Phys. Lett. 98, 142109 (2011).
K. Takashina, Y. Niida, V. T. Renard, A. Fujiwara, T. Fujisawa, K. Muraki, and Y. Hirayama, “Impact of Valley Polarization on the Resiastivity in Two Dimension”, Phys. Rev. Lett. 106, 196403 (2011).
K. F. Yang, H. W. Liu, K. Nagase, T. D. Mishima, M. B. Santos, K. Nagase, and Y. Hirayama, “Nonlinear magnetic field dependence of spin polarization in high density two-dimensional electron systems”, New Journal of Physics 13, 083010 (2011).
Takashi Kobayashi, Norio Kumada, Takeshi Ota, Satoshi Sasaki, and Yoshiro Hirayama, “Low-frequency Spin Fluctuations in Skyrmions Confined by Wires: Measurements of Local Nuclear Spin Relaxation”, Phys. Rev. Lett. 107, 126807 (2011)..
K. Akiba, S. Kanasugi, K. Nagase, and Y. Hirayama, “Resistive detection of optical nuclear polarization with spin phase transition peak at Landau level filling factor 2/3”, Appl. Phys. Lett., 99, 112106 (2011).
Tatsuro Yuge, Susumu Sasaki, and Yoshiro Hirayama, “Measurement of noise spectrum using a multiple-pulse sequence”, Phys. Rev. Lett. 107, 170504-1-4 (2011).

2010

S. Watanabe, G. Igarashia, K. Hashimoto, N. Kumada, and Y. Hirayama, “Spectroscopic study of nuclear magnetic resonance induced by oscillating electron spin domain walls”, Physica E: Low-dimensional Systems and Nanostructures, 42, 999 (2010).
D. Terasawa, S. Kozumi, A. Fukuda, M. Morino, K. Iwata, N. Kumada, Y. Hirayama, Z. F. Ezawa, and A. Sawada, “Activation study of collective excitations of the soliton- lattice phase in the =1 double-layer quantum Hall state”, Phys. Rev. B 81, 073303 (2010).
O. Klochan, J. C. H. Chen, A. P. Micolich, A. R. Hamilton, K. Muraki, and Y. Hirayama, “Fabrication and characterization of an induced GaAs single hole transistor”, Appl. Phys. Lett. 96, 092103 (2010).
D. Fukuoka, K. Oto, K. Muro, Y. Hirayama, and N. Kumada, “Skyrmion Effect on the Relaxation of Spin Waves in a Quantum Hall Ferromagnet”, Phys. Rev. Lett. 105, 126802 (2010).
S. Watanabe, M. H. Fauzi, N. Kumada and Y. Hirayama , “Nuclear spin polarization andrelaxationprobedbyspinphasetransitionpeak” ,PhysicaStatusSolidi(c),7,2570 (2010).
Kazuki Iwata, Masayuki Morino, Akira Fukuda, Norio Kumada, Zyun Francis Ezawa, Yoshiro Hirayama, and Anju Sawada, “Anisotropy of Magnetoresistance Hysteresis around the $¥nu=2/3$ Quantum Hall State in Tilted Magnetic Field”, J. Phys. Soc. Jpn., 79, 123701 (2010).
H. W. Liu, K. F. Yang, T. D. Mishima, M. B. Santos, and Y. Hirayama, “Dynamic nuclear polarization and nuclear magnetic resonance in the simplest pseudospin quantum Hall ferromagnet”, Phys. Rev. B 82(RC), 241304 (2010).

2009

Y. Hirayama, G. Yusa, K. Hashimoto, N. Kumada, T. Ota, and K. Muraki, “Electron- spin / nuclear –spin interactions and NMR in semiconductors”, Semicond. Sci. Technol. 24, 023001 (2009) [Topical Review].
Y. Niida, K. Takashina, A. Fujiwara, T. Fujisawa, and Y. Hirayama, ”Spin splitting of upper electron subbands in a SiO2/Si(100)/SiO2 quantum well with in-plane magnetic field”, Appl. Phys. Lett. 94, 142101 (2009).
O. Klochan, A. P. Micolich, L. H. Ho, A. R. Hamilton, K. Muraki, and Y. Hirayama, “The interplay between one-dimensional confinement and two-dimensional crystallographic anisotropy effects in ballistic hole quantum wires”, New J. Phys. 11, 043018 (2009).

2008

T. Ota, G. Yusa, N. Kumada, S. Miyashita, T. Fujisawa and Y. Hirayama, “Initialization and logic gate operations of nuclear spin qubits using a submicron scale resistively-detected NMR device”, Physica Status Solidi (c) 5, 306-309 (2008) January.
S. Nomura, M. Yamaguchi, T. Akazaki, H. Tamura, T. Maruyama, S. Miyashita, and Y. Hirayama, “Enhancement of electron and hole effective masses in back-gated GaAs/AlxGa1-xAs quantum wells”, Phys. Rev. B76, 201306 (2007).
W. R. Clarke, C. E. Yasin, A. R. Hamilton, A. P. Micolich, M. Y. Simmons, K. Muraki, Y. Hirayama, M. Pepper, and D. A. Ritchie, “Impact of long- and short-range disorder on the metallic behavior of two-dimensional systems”, Nature Physics 4. 55-59 (2008).
Norio Kumada, Koji Muraki and Yoshiro Hirayama, “NMR study of a canted antiferromagnet in a bilayer quantum Hall system”, Physica E40, 937-41 (2008).
A. Fukuda, D. Terasawa, M. Morino, K. Iwata, S. Kozumi, N. Kumada, Y. Hirayama, Z. F. Ezawa and A. Sawada, “Pseudospin Soliton in the =1 Bilayer Quantum Hall State”, Phys. Rev. Lett. 100, 016801 (2008).
H. W. Liu, T. Fujisawa, Y. Ono, H. Inokawa, A. Fujiwara, K. Takashina and Y. Hirayama, “Pauli-spin-blockade transport through a silicon double quantum dot”, Phys. Rev. B77, 073310 (2008).
P. Giudici, K. Muraki, N. Kumada, Y. Hirayama and T. Fujisawa, “Spin-Dependent Phase Diagram of the T=1 Bilayer Electron System”, Phys. Rev. Lett. 100, 106803 (2008).
Amaud Valeille, Koji Muraki and Yoshiro Hirayama, “Highly reproducible fabrication of back-gated GaAs/AlGaAs heterostructures using AuGeNi ohmic contacts with initial Ni layer”, Appl. Phys. Lett. 92, 152106 (2008).
N. Kumada, K. Iwata, K. Tagashira, Y. Shimoda, K. Muraki, Y. Hirayama and A. Sawada, “Modulation of bilayer quantum Hall states by tilted-field-induced subband- Landau-level coupling”, Phys. Rev. B77, 155324 (2008).
V. T. Renard, O. A. Tkachenko, V. A. Tkachenko, T. Ota, N. Kumada, J. –C. Portal and Y. Hirayama, “Boundary-Mediated Electron-Electron Interactions in Quantum Point Contacts”, Phys. Rev. Lett. 100, 186801 (2008).
Hongwu Liu, Toshimasa Fujisawa, Hiroshi Inokawa, Yukinori Ono, Akira Fujiwara and Yoshiro Hirayama, “A gate-defined silicon quantum dot molecule”, Appl. Phys. Lett. 92, 222104 (2008).
T. Hatano, S. Amaha, T. Kubo, Y. Tokura, Y. Nishi, Y. Hirayama and S. Tarucha, “Manipulation of exchange coupling energy in a few-electron double quantum dot”, Phys. Rev. B77, 241301(RC) (2008).
N. Kumada, T. Kamada, S. Miyashita, Y. Hirayama and T. Fujisawa, ”Electric Field Induced Nuclear Spin Resonance Mediated by Oscillating Electron Spin Domains in GaAs-Based Semiconductors”, Phys. Rev. Lett. 101, 137602 (2008).
M.Yamaguchi, S. Nomura, T. Maruyama, S. Miyashita, Y. Hirayama, H. Tamura, and T. Akazaki, “Evidence of a Transition from Nonlinear to Linear Screening of a Two- Dimensional Electron System Detected by Photoluminescence Spectroscopy”, Phys. Rev. Lett. 101, 207401 (2008).
K. Hashimoto, C. Sohrmann, J. Wiebe, T. Inaoka, F. Meier, Y. Hirayama, R. A. Roemer, R. Wiesendanger and M. Morgenstern, ”Quantum Hall Transition in Real Space: From Localized to Extended States”, Phys. Rev. Lett. 101, 256802 (2008).

2007

T. Ota, G. Yusa, N. Kumada, S. Miyashita, and Y. Hirayama, “Nuclear spin population and its control toward initialization using an all-electrical submicron nuclear magnetic resonance device”, Appl. Phys. Lett. 90, 102118 (2007).
Kyoichi Suzuki, Kiyoshi Kanisawa, Simon Perraud, Mineo Ueki, Kei Takashina, and Yoshiro Hirayama, “Imaging of subbands in InAs/GaSb double quantum wells by low- temperature scanning tunneling spectroscopy”, J. Crystal Growth 301-302, 97-100 (2007).
S. Watnabe, J. Harada, S. Sasaki, and Y. Hirayama, “Dynamic suppression of nuclear- spin decoherence time in Si and GaAs using inversion pulses”, J. Magnetism and Magnetic Materials 310, 2167 (2007).
S. Watanabe, J. Harada, S. Sasaki, and Y. Hirayama, “Dynamical Suppression of Nuclear-Spin Decoherence Time in Si and GaAs Using Inversion Pulses”, J. Magnetism and Magnetic Materials 310, 2167-69 (2007).
K. Takashina, B. Gaillard, Y. Ono and Y. Hirayama, “Low Temperature Characteristics of Ambipolar SiO2/Si/SiO2 Hall-bar Devices”, Jpn. J. Appl. Phys. 46, 2545-53 (2007).
Kyoichi Suzuki, Kiyoshi Kanisawa, Camille Janer, Simon Perraud, Kei Takashina, Toshimasa Fujisawa, and Yoshiro Hirayama, “Spatial imaging of two-dimensional electronic states in semiconductor quantum wells”, Phys. Rev. Lett. 98, 136802 (2007).
K. Suzuki, K. Kanisawa, S. Perraud, M. Ueki, K. Takashina, and Y. Hirayama, “Observation of subband standing waves in superlattices by low-temperature scanning tunneling spectroscopy”, J. Appl. Phys. 101, 081705 (2007).
Yoshiro Hirayama, Tetsuomi Sogawa, Kyoichi Suzuki, Kiyoshi Kanisawa, and Hiroshi Yamaguchi, “Semiconductor heterostructure studies using emerging technologies”, Physica Status Solidi (b), 244, 2988-3001 (2007).
K. Takashina, M. Brun, T. Ota, K. Maude, A. Fujiwara, Y. Ono, Y. Takahashi, and Y. Hirayama, “Anomolous Resistance Ridges along Filling Factor =4i”, Phys. Rev. Lett. 99, 036803 (2007).
N. Kumada, K. Muraki, and Y. Hirayama, “NMR Evidence for Spin Canting in a Bilayer =2 Quantum Hall System”, Phys. Rev. Lett. 99, 076805 (2007).
T. Ota, G. Yusa, N. Kumada, S. Miyashita, T. Fujisawa, and Y. Hirayama, “Decoherence of nuclear spins due to dipole-dipole interactions probed by resistively detected nuclear magnetic resonance”, Appl. Phys. Lett. 91, 193101 (2007).

2006

T. Fujisawa, R. Tomita, T. Hayashi, and Y. Hirayama, "Bidirectional counting of single electrons", Science 312, 1634 (2006).
N. Kumada, K. Muraki, and Y. Hirayama,“Low-Frequency Spin Dynamics in a Canted Antiferromagnet”, Science 313, 329 (2006).
Huang-Ming Lee, Koji Muraki, Edward Yi Chang, and Yoshiro Hirayama, “Electronic transport characteristics in a one-dimensional constriction defined by a triple-gate structure”, J. Appl. Phys., 100, 043701 (2006).
Simon Perraud, Kiyoshi Kanisawa, Zhao-Zhong Wang, and Yoshiro Hirayama, “Unpinning of the Fermi Level at (111)A clean surfaces of epitaxially grown n-type In0.53Ga0.47As”, Appl. Phys. Lett., 89, 192110 (2006).
Y. Hirayama, A. Miranowicz, T. Ota, G. Yusa, K. Muraki, S. K. Ozdemir, and N. Imoto, “Nanometre-scale nuclear-spin device for quantum information processing”, J. Phys.: Condens. Matter 18, S885 (2006).
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