Topological insulators and superconductors based on p-wave magnets: Electrical control and detection of a domain wall
Motohiko Ezawa
DOI 10.1103/PhysRevB.110.165429 · Physical Review B
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Abstract
Recently proposed p-wave magnets are time-reversal preserved antiferromagnets, where the detection and control of a domain wall is a highly nontrivial problem. We study a one-dimensional hybrid system made of a p-wave magnet and a metal possessing the orbital degree of freedom. The hybrid system is a topological insulator without the spin-orbit interaction. There emerge two boundary states per one boundary, because the system is mapped to a set of two copies of a topological insulator. Each copy resembles the long-range Su-Schrieffer-Heeger model, but their topological phase diagrams are different. A topological interface state emerges at a domain wall in the p-wave magnet, which is charged due to the Jackiw-Rebbi mechanism. Consequently, a domain wall in the p-wave magnet will be controllable and detectable purely by electrical means. We also study Majorana fermions induced by proximity coupling of s-wave superconductivity and a p-wave magnet.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeNiAsO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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