Edge modes, edge currents, and gauge invariance in px+ipy superfluids and superconductors
Michael Stone, Rahul Roy
DOI 10.1103/PhysRevB.69.184511 · Physical Review B
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Abstract
The excitation spectrum of a two-dimensional px+ipy fermionic superfluid, such as a thin film of 3He−A, includes a gapless Majorana-Weyl fermion which is confined to the boundary by Andreev reflection. There is also a persistent ground-state boundary current which provides a droplet containing N particles with angular momentum ħN/2. Both of these boundary effects are associated with bulk Chern-Simons effective actions. We show that the gapless edge mode is required for the gauge invariance of the total effective action, but the same is not true of the boundary current.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 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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