Higher-order topological superconductivity in monolayer WTe2 from repulsive interactions
Ammar Jahin, Yuxuan Wang
DOI 10.1103/PhysRevB.108.014509 · Physical Review B
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Abstract
Superconductivity has been experimentally observed in monolayer WTe2, in which the suggested in-plane field measurements are of a spin-triplet nature. Furthermore, it has been proposed that with a p-wave pairing, the material is a second-order topological superconductor with a pair of Majorana zero modes at the corners of a finite sample. We show that for a repulsive on-site interaction and sizable Fermi surfaces, the desired p-wave state arises naturally due to the Kohn-Luttinger mechanism, and indeed a finite superconducting sample hosts corner Majorana zero modes. We study the behavior of the critical temperature in response to external in-plane magnetic fields. We find an enhancement to the critical temperature that depends on the direction of the magnetic field, which can be directly verified experimentally.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| WTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure not reported | unknown |
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