Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Nakai, Ryota"'
Quantum anomalous, quantum spin, and quantum valley Hall effects in pentalayer rhombohedral graphene
Recent experiments in pentalayer rhombohedral graphene moir\'e superlattice have observed the quantum anomalous Hall effect at the moir\'e filling factor $\nu=1$ and various fractions. These effects result from a flat Chern band induced by electron-e
Externí odkaz:
http://arxiv.org/abs/2406.14354
Quantum-Hall--Superconductor hybrids have been predicted to exhibit various types of topological order, providing possible platforms for intrinsically fault-tolerant quantum computing. In this paper, we develop a formulation to construct this hybrid
Externí odkaz:
http://arxiv.org/abs/2401.04426
We introduce and formulate the boundary condition twisted by the energy (time translation) in one-dimensional quantum many-body systems. The stiffness against this boundary condition quantifies thermal analogues of the Drude weight and the Meissner s
Externí odkaz:
http://arxiv.org/abs/2307.14649
Autor:
Nakai, Ryota, Nomura, Kentaro
Publikováno v:
Phys. Rev. B 108, 184517 (2023)
Higher-order topological phases are gapped phases of matter that host gapless corner or hinge modes. For the case of superconductors, corner or hinge modes are gapless Majorana modes or Majorana zero modes. To construct 3d higher-order topological su
Externí odkaz:
http://arxiv.org/abs/2307.13312
Publikováno v:
Phys. Rev. B 108, 075108 (2023)
The Hatano-Nelson model is one of the most prototypical non-Hermitian models that exhibit the intrinsic non-Hermitian topological phases and the concomitant skin effect. These phenomena unique to non-Hermitian topological systems originate from the G
Externí odkaz:
http://arxiv.org/abs/2301.05973
Publikováno v:
J. Phys. Soc. Jpn. 91, 123703 (2022)
We studied the tunnel transport between the edge of a Pfaffian fractional quantum Hall state and that of an integer quantum Hall state. Based on the duality argument between the strong and weak tunnelings, we found that an Andreev-like reflection app
Externí odkaz:
http://arxiv.org/abs/2208.03336
Publikováno v:
Phys. Rev. B 106, 155128 (2022)
Thermal transport in condensed matter systems is traditionally formulated as a response to a background gravitational field. In this work, we seek a twisted-boundary-condition formalism for thermal transport in analogy to the $U(1)$ twisted boundary
Externí odkaz:
http://arxiv.org/abs/2206.00641
Publikováno v:
Phys. Rev. B 103, 184509 (2021)
Despite the robustness of the chiral edge modes of quantum Hall systems against the superconducting proximity effect, Cooper pairs can penetrate into the chiral edge channels and carry the Josephson current in an appropriate setup. In our work, the J
Externí odkaz:
http://arxiv.org/abs/2102.04679
Autor:
Nakai, Ryota, Nomura, Kentaro
Publikováno v:
Phys. Rev. B 101, 094510 (2020)
Topologically nontrivial superconducting phases have been engineered in topological materials by the proximity effect in contact with conventional superconductors. In this paper, by using the method of the Kronig-Penney model, we study the supercondu
Externí odkaz:
http://arxiv.org/abs/1911.12523
Publikováno v:
Phys. Rev. B 100, 155123 (2019)
Real-time evolution and charge pumping in magnetic Weyl semimetals are studied by solving the time-dependent Schr\"{o}dinger equations. In the adiabatic limit of the real-time evolution, we show that the total pumped charge is quantized in the magnet
Externí odkaz:
http://arxiv.org/abs/1907.08573