743 citations · 4.7k across the 83 of their papers we have counts for
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Enhanced -periodic Aharonov-Bohm Effect as a Signature of Majorana Zero Modes Probed by Nonlocal Measurements
Masayuki Sugeta, Takeshi Mizushima, Satoshi Fujimoto
We propose the -periodic Aharonov-Bohm (AB) effect as a nonlocal probe of Majorana zero modes (MZMs) without the restriction of fermion parity. We demonstrate the enhancement o…
Spectrum collapse of disordered Dirac Landau levels as topological non-Hermitian physics
Taiki Matsushita, Yuki Nagai, Satoshi Fujimoto
We investigate disorder effects on Landau levels in Dirac electron systems with the use of a non-Hermitian quasiparticle Hamiltonian formalism. This formalism reveals that spin-dep…
Topological piezoelectric effect and parity anomaly in nodal line semimetals
Taiki Matsushita, Satoshi Fujimoto, Andreas P. Schnyder
Lattice deformations act on the low-energy excitations of Dirac materials as effective axial vector fields. This allows to directly detect quantum anomalies of Dirac materials via…
Disorder-induced exceptional and hybrid rings in Weyl/Dirac semimetals
Taiki Matsushita, Yuki Nagai, Satoshi Fujimoto
Non-Hermiticity in Weyl Hamiltonian leads to the realization of Weyl exceptional rings and flat bands inside the Weyl exceptional rings. Recently, the platform of non-Hermitian phy…
Adiabatic and nonadiabatic spin torques induced by spin-triplet supercurrent
Rina Takashima, Satoshi Fujimoto, Takehito Yokoyama
We study spin transfer torques induced by a spin-triplet supercurrent in a magnet with the superconducting proximity effect. By a perturbative approach, we show that spin-triplet c…
Supercurrent-induced Skyrmion dynamics and Tunable Weyl points in Chiral Magnet with Superconductivity
Rina Takashima, Satoshi Fujimoto
Recent studies show superconductivity provides new perspectives on spintronics. We study a heterostructure composed of an s-wave superconductor and a cubic chiral-magnet that can s…
Torsional chiral magnetic effect in Weyl semimetal with topological defect
Hiroaki Sumiyoshi, Satoshi Fujimoto
We propose a torsional response raised by lattice dislocation in Weyl semimetals akin to chiral magnetic effect; i.e. a fictitious magnetic field arising from screw or edge disloca…
Quantum Thermal Hall Effect in a Time-Reversal-Symmetry-Broken Topological Superconductor in Two Dimensions : Approach From Bulk Calculations
Hiroaki Sumiyoshi, Satoshi Fujimoto
We discuss thermal transport of two-dimensional topological superconductors (TSCs) with broken time reversal symmetry, which are described by Bogoliubov-de Gennes (BdG) Hamiltonian…
Electromagnetic and thermal responses of Z topological insulators and superconductors in odd spatial dimensions
Ken Shiozaki, Satoshi Fujimoto
The relation between bulk topological invariants and experimentally observable physical quantities is a fundamental property of topological insulators and superconductors. In the c…
Bulk-edge correspondence for Chern topological phases: A viewpoint from a generalized index theorem
T. Fukui, K. Shiozaki, T. Fujiwara +1
We explore the bulk-edge correspondence for topological insulators (superconductors) without time-reversal symmetry from the point of view of the index theorem for open spaces. We…
Index theorem for topological heterostructure systems
Ken Shiozaki, Takahiro Fukui, Satoshi Fujimoto
We apply the Niemi-Semenoff index theorem to an s-wave superconductor junction system attached with a magnetic insulator on the surface of a three-dimensional topological insulator…
Green's Function Method for Line Defects and Gapless Modes in Topological Insulators : Beyond Semiclassical Approach
Ken Shiozaki, Satoshi Fujimoto
Defects which appear in heterostructure junctions involving topological insulators are sources of gapless modes governing the low energy properties of the systems, as recently eluc…
Effect of Umklapp Scattering on the Conductance in Quantum Wires
Satoshi Fujimoto, Norio Kawakami
We investigate the system-size dependence as well as the temperature dependence of the conductance in 1D electron systems, paying particular attention to the effect of Umklapp scat…