Weyl phases in point-group symmetric superconductors

Vasudha Shivamoggi; Matthew J. Gilbert

doi:10.1103/PhysRevB.88.134504

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Weyl phases in point-group symmetric superconductors

Vasudha Shivamoggi, Matthew J. Gilbert

DOI 10.1103/PhysRevB.88.134504 · Physical Review B

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Abstract

We study superconductivity in a Weyl semimetal with broken time-reversal symmetry and stabilized by a point-group symmetry. The resulting superconducting phase is characterized by topologically protected bulk nodes and surface states with Fermi arcs. The topological invariant governing the system is calculated using changes in eigenvalues of the point-group operator along high-symmetry momentum lines. We show that this invariant is determined by the Fermi surface topology of the Weyl semimetal. We discuss the effect of surface orientation and C4-breaking strain as possible experimental consequences.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown