![Tetsuo HANAGURI](../../../member/img/c01_hanaguri_photo.jpg)
Tetsuo HANAGURI
Senior Research Scientist, Magnetic Materials Laboratory, RIKEN- Topics of Research:
- (C01) Novel Phenomena in Electron Fluids with Broken Inversion Symmetry
■ Laboratory Website
■ Description of Research
[206KB]
RESEARCH
I have investigated emerging phenomena in superconductors using various experimental techniques. In recent 10 years, I am concentrating on scanning tunneling microscopy/spectroscopy (STM/STS), which is a very powerful tool to image the electronic state with a spatial resolution high enough to resolve individual atoms. In this project, I will utilize STM/STS to study topological insulators. Topological insulator is a new state of matter which has energy gap in the bulk but possesses robust gapless surface states.
![Tetsuo HANAGURI RESEARCH image](../../../member/img/c01_hanaguri_img.jpg)
The surface state is characterized by Dirac fermions which would give rise to unique quantum phenomena in a magnetic field. Unfortunately, real topological insulators so far known all contain bulk carriers which are generated by unavoidable defects in the crystals; surface sensitive technique which is doable under magnetic field is thus highly demanded. STM/STS can be such a technique. Using our high-performance STM, I will search for novel quantum phenomena and will study effects of impurities on surface Dirac fermions.
EDUCATION
- 1988
- BE in Applied Physics, Tohoku University
- 1993
- Ph.D. in Applied Physics, Tohoku University
PROFESSIONAL EXPERIENCE
- 1993
- Research Associate, Department of Basic Science, University of Tokyo
- 1999
- Associate Professor, Department of Advanced Materials Science, University of Tokyo
- 2004
- Senior Research Scientist, Magnetic Materials Laboratory, RIKEN
SELECTION OF PUBLICATIONS
"Momentum-resolved Landau-level spectroscopy of Dirac surface state in Bi2Se3",
T. Hanaguri, K. Igarashi,M. Kawamura, H. Takagi and T. Sasagawa
Phys. Rev. B, 82, 081305(R) (2010).
" Unconventional s-Wave Superconductivity in Fe(Se,Te)",
T. Hanaguri, S. Niitaka, K. Kuroki and H. Takagi
Science, 328, 474-476 (2010).
"Coherence Factors in a High-Tc Cuprate Probed by Quasi-particle Scattering off Vortices",
T. Hanaguri, Y. Kohsaka, M. Ono, M. Maltseva, P. Coleman, I. Yamada, M. Azuma, M. Takano, K. Ohishi and H. Takagi
Science, 323, 923-926 (2009).
"
Quasiparticle interference and superconducting gap in Ca2-xNaxCuO2Cl2",
T. Hanaguri, Y. Kohsaka, J. C. Davis, C. Lupien, I. Yamada, M. Azuma, M. Takano, K. Ohishi, M. Ono
and H. Takagi
Nature Phys., 3, 865-871 (2007).
"A 'checkerboard' electronic crystal state in lightly hole-doped Ca2-xNaxCuO2Cl2",
T. Hanaguri, C. Lupien, Y. Kohsaka, D. -H. Lee, M. Azuma, M. Takano, H. Takagi and J. C. Davis,
Nature, 430, 1001-1005 (2004).