743 citations · 4.7k across the 83 of their papers we have counts for
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Non-local spin correlation as a signature of Ising anyons trapped in vacancies of the Kitaev spin liquid
Masahiro O. Takahashi, Masahiko G. Yamada, Masafumi Udagawa +2
In the Kitaev chiral spin liquid, Ising anyons are realized as fluxes binding Majorana zero modes, which, however, are thermal excitations with finite decay rates. On the oth…
Engineering Yang-Lee anyons via Majorana bound states
Takumi Sanno, Masahiko G. Yamada, Takeshi Mizushima +1
We propose the platform of a Yang-Lee anyon system which is constructed from Majorana bound states in topological superconductors. Yang-Lee anyons, described by the non-unitary con…
Thermodynamic signature of the spin-orbital liquid and symmetry fractionalization from the Lieb-Schultz-Mattis theorem
Masahiko G. Yamada, Satoshi Fujimoto
The Heisenberg model on the honeycomb lattice is expected to host a quantum spin-orbital liquid at low temperature with an astonishing candidate material, -ZrCl…
Quantum liquid crystals in the finite-field K model for -RuCl
Masahiko G. Yamada, Satoshi Fujimoto
We study the extended Kitaev model called the K model, using a perturbative expansion combined with a well-controlled mean-field approximation and a cutting-edge exact diagonali…
Dissipationless Spin Current Generation in Kitaev's Chiral Spin Liquid
Daichi Takikawa, Masahiko G. Yamada, Satoshi Fujimoto
-RuCl is a promising candidate material for the Kitaev spin liquid state where the half quantization of the thermal Hall effect, suggesting a topological character, has been…
Topological Nematic Phase Transition in Kitaev Magnets Under Applied Magnetic Fields
Masahiro O. Takahashi, Masahiko G. Yamada, Daichi Takikawa +2
We propose a scenario of realizing the toric code phase, which can be potentially utilized for fault-tolerant quantum computation, in candidate materials of Kitaev magnets. It is d…
Electric probe for the toric code phase in Kitaev materials through the hyperfine interaction
Masahiko G. Yamada, Satoshi Fujimoto
The Kitaev model is a remarkable spin model with gapped and gapless spin liquid phases, which are potentially realized in iridates and -RuCl. In the recent experiment of …
Thermodynamic evidence for field-angle dependent Majorana gap in a Kitaev spin liquid
O. Tanaka, Y. Mizukami, R. Harasawa +8
The exactly-solvable Kitaev model of two-dimensional honeycomb magnet leads to a quantum spin liquid (QSL) characterized by Majorana fermions, relevant for fault-tolerant topologic…
Topological phase transition to Abelian anyon phases due to off-diagonal exchange interaction in the Kitaev spin liquid state
Daichi Takikawa, Satoshi Fujimoto
We investigate how the Kitaev spin liquid state described by Majorana fermions coupled with gauge fields is affected by non-Kitaev interactions which exist in real candidate…
Impact of off-diagonal exchange interactions on the Kitaev spin liquid state of -RuCl
Daichi Takikawa, Satoshi Fujimoto
Motivated by the recent experimental observation of the half-quantized thermal Hall conductivity for the candidate material of the Kitaev spin liquid, -RuCl[ Y. Kasahara et…
Characterization of a topological Mott insulator in one dimension
Tsuneya Yoshida, Robert Peters, Satoshi Fujimoto +1
We investigate properties of a topological Mott insulator in one dimension by examining the bulk topological invariant and the entanglement spectrum of a correlated electron model.…
Electrodynamics in Skyrmions Merging
Rina Takashima, Satoshi Fujimoto
In a recent study the coalescence of magnetic skyrmions was observed in a metallic chiral magnet Fe0.5Co0.5Si when the skyrmion phase is destroyed, and numerical simulations demons…
Topological phase in a two-dimensional metallic heavy-fermion system
Tsuneya Yoshida, Robert Peters, Satoshi Fujimoto +1
We report on a topological insulating state in a heavy-fermion system away from half-filling, which is hidden within a ferromagnetic metallic phase. In this phase, the cooperation…
Topological antiferromagnetic phase in a correlated Bernevig-Hughes-Zhang model
Tsuneya Yoshida, Robert Peters, Satoshi Fujimoto +1
Topological properties of antiferromagnetic phases are studied for a correlated topological band insulator by applying the dynamical mean field theory to an extended Bernevig-Hughe…
Correlation effects on a topological insulator at finite temperatures
Tsuneya Yoshida, Satoshi Fujimoto, Norio Kawakami
We analyze the effects of the local Coulomb interaction on a topological band insulator (TBI) by applying the dynamical mean field theory to a generalized Bernevig-Hughes-Zhang mod…
Spin nematic state as a candidate of the hidden order phase of URuSi
Satoshi Fujimoto
Motivated by the recent discovery of broken four-fold symmetry in the hidden order phase of URuSi[R. Okazaki et al., Science {\bf 331}, 439 (2011)], we examine a scenario o…
Unconventional Anomalous Hall Effect in the Metallic Triangular-Lattice Magnet PdCrO2
Hiroshi Takatsu, Shingo Yonezawa, Satoshi Fujimoto +1
We experimentally reveal an unconventional anomalous Hall effect (UAHE) in a quasi-two-dimensional triangular-lattice antiferromagnet PdCrO2. Using high quality single crystals of…
Hall Effect of Spin Waves in Frustrated Magnets
Satoshi Fujimoto
We examine a possible spin Hall effect for localized spin systems with no charge degrees of freedom. In this scenario, a longitudinal magnetic field gradient induces a transverse s…
Thermodynamics of impurities in the anisotropic Heisenberg spin-1/2 chain
J. Sirker, S. Fujimoto, N. Laflorencie +2
The thermodynamics of finite open antiferromagnetic XXZ chains is studied using field theory, Bethe Ansatz and quantum Monte Carlo methods. For the susceptibility a parameter-free…
Microscopic Mechanism and Pairing Symmetry of Superconductivity in the Noncentrosymmetric Heavy Fermion Systems CeRhSI and CeIrSi
Yasuhiro Tada, Norio Kawakami, Satoshi Fujimoto
We study the pairing symmetry of the noncentrosymmetric heavy fermion superconductors CeRhSi and CeIrSi under pressures, which are both antiferromagnets at ambient pressure…
Fermi liquid theory for heavy fermion superconductors without inversion symmetry : Magnetism and transport coefficients
Satoshi Fujimoto
We present the microscopic Fermi liquid theory for magnetic properties and transport phenomena in interacting electron systems without inversion symmetry both in the normal state a…
Low-energy properties of two-dimensional quantum triangular antiferromagnets: Non-perturbative renormalization group approach
Satoshi Fujimoto
We explore low temperature properties of quantum triangular Heisenberg antiferromagnets in two dimension in the vicinity of the quantum phase transition at zero temperature. Using…
Quantum Disordered Ground States in Frustrated Antiferromagnets with Multiple Ring Exchange Interactions
Satoshi Fujimoto
We present a certain class of two-dimensional frustrated quantum Heisenberg spin systems with multiple ring exchange interactions which are rigorously demonstrated to have quantum…
Kondo Problem and Related One-Dimensional Quantum Systems: Bethe Ansatz Solution and Boundary Conformal Field Theory
Satoshi Fujimoto, Norio Kawakami
We review some exact results on Kondo impurity systems derived from Bethe-ansatz solutions and boundary conformal field theory with particular emphasis on universal aspects of the…