Signatures of surface Majorana modes in the magnetic response of topological superconductors
Luca Chirolli, Francisco Guinea
DOI 10.1103/PhysRevB.99.014506 · Physical Review B
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Abstract
We study the magnetic susceptibility of a two-dimensional cone of Majorana modes localized at the surface of a three-dimensional time-reversal invariant topological superconductor belonging to class DIII. A field parallel to the surface tilts the surface Majorana cone along the supercurrent direction. For fields larger than a critical threshold field H*, H>H*, a transition from a type I to a type II Dirac cone occurs and a finite current carried by the Majorana modes starts to flow, leading to an additional diamagnetic contribution to the surface magnetization. On a curved surface, interband transitions are promoted by the Majorana spin connection that couples to the external field, giving rise to a finite-frequency magnetic susceptibility.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Se3 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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