<Japanese homepage>

Ryuichi Masutomi


Department of Physics, University of Tokyo
7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, JAPAN
Phone: +81-3-5841-4129
Fax: +81-3-5841-4532
E-mail: masutomi[AT]
Personal: Born May 28, 1975 in Tokushima, Japan, Married; 2 children


March 1998: B.S. Degree from Department of Physics, Sophia University
March 2000: M.E. Degree from Department of Applied Physics, University of Tokyo
May 2003: Ph.D. Degree from Department of Applied Physics, University of Tokyo


2000-2003 Research Assistant, Institute for Solid State Physics, University of Tokyo
2003-2004 Postdoctoral Research Scientist, Rutgers, The State University of New Jersey (H. Kojima Lab.)
2004-2006 Postdoctoral Research Scientist, Tokyo Institute of Technology (N. Nishida Lab.)
2006-present Research Associate, University of Tokyo


・Two-dimensional superconducting state of monolayer Pb films grown on GaAs(110) in a strong parallel magnetic field
 Takayuki Sekihara, R. Masutomi, and T. Okamoto
 Phys. Rev. Lett. 111, 057005 (2013); arXiv:1307.2951

・In-plane magnetic field dependence of cyclotron relaxation time in a Si two-dimensional electron system
 Tasuku Chiba, Ryuichi Masutomi, Kentarou Sawano, Yasuhiro Shiraki, and Tohru Okamoto
 Phys. Rev. B 86, 045310 (2012); arXiv:1307.2955

・Metallic Behavior of Cyclotron Relaxation Time in Two-Dimensional Systems
 R. Masutomi, K. Sasaki, I. Yasuda, A. Sekine, K. Sawano, Y. Shiraki, and T. Okamoto
 Phys. Rev. Lett. 106, 196404 (2011); arXiv:1105.4778

・Optical Hall Effect in the Integer Quantum Hall Regime
 Y. Ikebe, T. Morimoto, R. Masutomi, T. Okamoto, H. Aoki, and R. Shimano
 Phys. Rev. Lett. 104, 256802 (2010); arXiv:1004.0308

・Well width dependence of valley splitting in Si/SiGe quantum wells
 K. Sasaki, R. Masutomi, K. Toyama, K. Sawano, Y. Shiraki, T. Okamoto
 Appl. Phys. Lett. 95, 222109 (2009); arXiv:0911.1847

・Strain dependence of hole effective mass and scattering mechanism in strained Ge channel structures
 K. Sawano, K. Toyama, R. Masutomi, T. Okamoto, N. Usami, K. Arimoto, K. Nakagawa, and Y. Shiraki
 Appl. Phys. Lett. 95, 122109 (2009)

・Insulating Phases Induced by Crossing of Partially Filled Landau Levels in a Si Quantum Well
 Tohru Okamoto, Kohei Sasaki, Kiyohiko Toyama, Ryuichi Masutomi, Kentarou Sawano, and Yasuhiro Shiraki
 Phys. Rev. B 79, 241302(R) (2009); arXiv:0903.0486

・Evidence for Two-Dimensional Spin-Glass Ordering in Submonolayer Fe Films on cleaved InAs surfaces
 T. Mochizuki, R. Masutomi and T. Okamoto
 Phys. Rev. Lett. 101, 267204 (2008); arXiv:0810.4425

・Alkali-metal-induced Fermi-level and two-dimensional electrons at cleaved InAs(110) surfaces
 M. Minowa, R. Masutomi, T. Mochizuki and T. Okamoto
 Phys. Rev. B 77, 233301 (2008); arXiv:0803.4448

・Quantum Hall effect at cleaved InSb surfaces and low-temperature annealing effect
 Ryuichi Masutomi, Masayuki Hio, Toshimitsu Mochizuki and Tohru Okamoto
 Appl. Phys. Lett. 90, 202104 (2007); cond-mat/0703670

・Pressure-induced ferromagnetic solid 3He layer on 4He preplated graphite
 A. Yamaguchi, T. Watanuki, R. Masutomi and H. Ishimoto
 Phys. Rev. B 75, 092501 (2007)

・Growth of a Third Ferromagnetic Solid 3He Layer on Graphite
 A. Yamaguchi, T. Watanuki, R. Masutomi and H. Ishimoto
 Phys. Rev. Lett. 93, 165301 (2004)

・Gapless Spin Liquid Behavior in Two-Dimensional Solid 3He
 Ryuichi Masutomi, Yoshitomo Karaki and Hidehiko Ishimoto
 Phys. Rev. Lett. 92, 025301 (2004)

・Anomalous Magnetic-Field Dependence of Positive Ion Mobility in Normal Liquid 3He
 K. Obara, D. Ueno, R. Masutomi, A. Yamaguchi, V. Efimov and H. Ishimoto
 Phys. Rev. Lett. 87, 235301 (2001)

・Low-Temperature Magnetization of Submonolayer 3He Adsorbed on HD Preplated Graphite
 Hiroki Ikegami, Ryuichi Masutomi, Ken Obara and Hidehiko Ishimoto
 Phys. Rev. Lett. 85, 5146 (2000)