Quantum thermal Hall effect of Majorana fermions on the surface of superconducting topological insulators

Yosuke Shimizu, Ai Yamakage, Kentaro Nomura

研究成果: Article査読

6 被引用数 (Scopus)

抄録

We study the quantum anomalous thermal Hall effect in a topological superconductor, which possesses an integer bulk topological number and supports Majorana excitations on the surface. To realize the quantum thermal Hall effect, a finite gap at the surface is induced by applying an external magnetic field or by the proximity effects with magnetic materials or s-wave superconductors with complex pair potentials. Basing on the lattice model Hamiltonian for superconducting states in Cu-doped Bi2Se3, we compute the thermal Hall conductivity as a function of various parameters such as the chemical potential, the pair potential, and the spin-orbit coupling-induced band gap. It is argued that the bulk topological invariant corresponds to the quantization rule of the thermal Hall conductivity induced by complex s-wave pair potentials.

本文言語English
論文番号195139
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
91
19
DOI
出版ステータスPublished - 2015 5 26

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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