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Local Raman Spectroscopy of Chiral Majorana Edge Modes in Kitaev Spin Liquids and Topological Superconductors
James Jun He, Naoto Nagaosa
The Raman scattering with local optical excitation from the Majorana edge modes of Kitaev spin liquids and topological superconductors is studied theoretically. Although the effect…
Optical Responses of Chiral Majorana Edge States in Two-Dimensional Topological Superconductors
James Jun He, Yukio Tanaka, Naoto Nagaosa
Majorana fermions exist on the boundaries of two-dimensional topological superconductors (TSCs) as charge-neutral quasi-particles. The neutrality makes the detection of such states…
A phenomenological theory of superconductor diodes
James Jun He, Yukio Tanaka, Naoto Nagaosa
We study theoretically the superconductor diodes, where the magnitude of the critical current changes as the direction is reversed, in terms of a generalized Ginzburg-Landau model…
Higher-Order Weyl-Exceptional-Ring Semimetals
Tao Liu, James Jun He, Zhongmin Yang +1
For first-order topological semimetals, non-Hermitian perturbations can drive the Weyl nodes into Weyl exceptional rings having multiple topological structures and no Hermitian cou…