Helical Topological Superconducting Pairing at Finite Excitation Energies

Masoud Bahari; Song-Bo Zhang; Chang-An Li; Sang-Jun Choi; Philipp Rüßmann; Carsten Timm; Björn Trauzettel

doi:10.1103/PhysRevLett.132.266201

← Back to search

Helical Topological Superconducting Pairing at Finite Excitation Energies

Masoud Bahari, Song-Bo Zhang, Chang-An Li, Sang-Jun Choi, Philipp Rüßmann, Carsten Timm, Björn Trauzettel

DOI 10.1103/PhysRevLett.132.266201 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We propose helical topological superconductivity away from the Fermi surface in three-dimensional time-reversal-symmetric odd-parity multiband superconductors. In these systems, pairing between electrons originating from different bands is responsible for the corresponding topological phase transition. Consequently, a pair of helical topological Dirac surface states emerges at finite excitation energies. These helical Dirac surface states are tunable in energy by chemical potential and strength of band splitting. They are protected by time-reversal symmetry combined with crystalline twofold rotation symmetry. We suggest concrete materials in which this phenomenon could be observed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
BiSbTe1.25Se1.75 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown