Topological superconducting phase and Majorana fermions in half-metal/superconductor heterostructures
Suk Bum Chung, Hai-Jun Zhang, Xiao-Liang Qi, Shou-Cheng Zhang
DOI 10.1103/PhysRevB.84.060510 · Physical Review B
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Abstract
As a half-metal is spin polarized at its Fermi level by definition, it was conventionally thought to have little proximity effect to an s-wave superconductor. Here we show that with interface spin-orbit coupling px+ipy superconductivity without spin degeneracy is induced on the half-metal, and we give an estimate of its bulk energy gap. Therefore, a single-band half-metal can give us a topological superconductor with a single chiral Majorana edge state. Our band calculation shows that two atomic layers of VTe or CrO2 is a single-band half-metal for a wide range (∼0.1 eV) of Fermi energy and thus is a suitable candidate material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbTiN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14 | Pressure not reported | unknown |
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