Members Profile

Hosho Katsura

Hosho Katsura

Associate Professor, Department of Physics, the University of Tokyo

Edge states and low-energy excitations in strongly correlated topological phases

E-mail : katsura[at]


My research interests focus on strongly correlated and topological systems. In particular, I have theoretically proposed a microscopic mechanism of spin-driven ferroelectricity, the thermal Hall effect in insulating magnets, and nearly flat bands with nontrivial topology. I am also interested in mathematical aspects of quantum many-body systems, including Hubbard-type models and quantum spin chains.

One of the characteristics of non-interacting topological phases is the appearance of edge states at their boundaries. In this project, I would like to extend the notion of these edge states to interacting topological systems. More precisely, I will study a many-body analogue of edge states in strongly correlated Majorana-fermion systems. I will also investigate supersymmetry breaking and the associated exotic particles in fermionic lattice models.


B.Sc. in Physics, University of Tokyo
Ph.D. in Applied Physics, University of Tokyo


Postdoc (Special postdoctoral researchers program of RIKEN)
JSPS postdoctoral fellowship for research abroad (KITP, UCSB)
Lecturer, Department of Physics, Gakushuin University
Associate Professor, Department of Physics, Gakushuin University
Associate Professor, Department of Physics, the University of Tokyo


Condensed Matter Physics Prize
The 9th Young Scientist Award of the Physical Society of Japan
Nevill F. Mott Prize (SCES 2016)


"Supersymmetry breaking and Nambu-Goldstone fermions in an extended Nicolai model"
Noriaki Sannomiya, Hosho Katsura, Yu Nakayama
Physical Review D, 94, 045014-1-13 (Aug. 2016).
DOI: 10.1103/PhysRevD.94.045014

"The Z2 Index of Disordered Topological Insulators with Time Reversal Symmetry"
Hosho Katsura, Tohru Koma
Journal of Mathematical Physics 57, 021903-1-13 (Feb. 2016).
DOI: 10.1063/1.4942494

"Exact ground states and topological order in interacting Kitaev/Majorana chains"
Hosho Katsura, Dirk Schuricht, Masahiro Takahashi
Physical Review B, 92, 115137-1-12 (Sep. 2015).
DOI: 10.1103/PhysRevB.92.115137

"Ground States of the Spin-1 Bose-Hubbard Model"
Hosho Katsura, Hal Tasaki
Physical Review Letters 110, 130405-1-5 (Mar. 2013).
DOI: 10.1103/PhysRevLett.110.130405

"General Relationship Between the Entanglement Spectrum and the Edge State Spectrum of Topological Quantum States"
Xiao-Liang Qi, Hosho Katsura, Andreas W. W. Ludwig
Physical Review Letters 108, 196402-1-5 (May 2012).
DOI: 10.1103/PhysRevLett.108.196402

"Nearly-flat bands with nontrivial topology"
Kai Sun, Zhengcheng Gu, Hosho Katsura, Sankar Das Sarma

Physical Review Letters 106, 236803-1-4 (Jun. 2011).
DOI: 10.1103/PhysRevLett.106.236803

"Observation of the Magnon Hall Effect"
Y. Onose, T. Ideue, H. Katsura, Y. Shiomi, N. Nagaosa, Y. Tokura
Science 329, 297-299 (Jul. 2010).
DOI: 10.1126/science.1188260

"Theory of the Thermal Hall Effect in Quantum Magnets"
Hosho Katsura, Naoto Nagaosa, Patrick A. Lee
Physical Review Letters 104, 066403-1-4 (Feb. 2010).
DOI: 10.1103/PhysRevLett.104.066403

"Quantum Spin Hall Effect in a Transition Metal Oxide Na2IrO3"
Atsuo Shitade, Hosho Katsura, Jan Kunes, Xiao-Liang Qi, Shou-Cheng Zhang, Naoto Nagaosa
Physical Review Letters 102, 256403-1-4 (Jun. 2009).
DOI: 10.1103/PhysRevLett.102.256403

"Spin Current and Magnetoelectric Effect in Noncollinear Magnets"
Hosho Katsura, Naoto Nagaosa, Alexander V. Balatsky
Physical Review Letters 95, 057205-1-4 (Jul. 2005).
DOI: 10.1103/PhysRevLett.95.057205