Nematic superconductivity in topological insulators induced by hexagonal warping

R. S. Akzyanov; D. A. Khokhlov; A. L. Rakhmanov

doi:10.1103/PhysRevB.102.094511

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Nematic superconductivity in topological insulators induced by hexagonal warping

R. S. Akzyanov, D. A. Khokhlov, A. L. Rakhmanov

DOI 10.1103/PhysRevB.102.094511 · Physical Review B

T1

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Abstract

We study the superconducting properties of the bulk states of a doped topological insulator. We obtain that hexagonal warping stabilizes the nematic spin-triplet superconducting phase with Eu pairing and the direction of the nematic order parameter which opens the full gap is the ground state. This order parameter exhibits non-BCS behavior. The ratio of the order parameter to the critical temperature of Δ(0)/Tc differs from the BCS ratio. It depends on the chemical potential and the value of the hexagonal warping. We discuss the relevance of the obtained results for the explanation of the experimental observations.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
SrxBi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CuxBi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sr0.1Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NbxBi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown