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.
%0 Journal Article
%1 PhysRevLett.132.266201
%A Bahari, Masoud
%A Zhang, Song-Bo
%A Li, Chang-An
%A Choi, Sang-Jun
%A Rüßmann, Philipp
%A Timm, Carsten
%A Trauzettel, Björn
%D 2024
%I American Physical Society
%J Phys. Rev. Lett.
%K a
%N 26
%P 266201
%R 10.1103/PhysRevLett.132.266201
%T Helical topological superconducting pairing at finite excitation energies
%U https://link.aps.org/doi/10.1103/PhysRevLett.132.266201
%V 132
%X 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.
@article{PhysRevLett.132.266201,
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.},
added-at = {2024-06-26T10:30:51.000+0200},
author = {Bahari, Masoud and Zhang, Song-Bo and Li, Chang-An and Choi, Sang-Jun and R\"u\ss{}mann, Philipp and Timm, Carsten and Trauzettel, Bj\"orn},
biburl = {https://www.bibsonomy.org/bibtex/23898fe184d8f0d2969348ad42354297c/ctqmat},
day = 24,
doi = {10.1103/PhysRevLett.132.266201},
interhash = {0427c39ae5c71782c30f4831662cb23b},
intrahash = {3898fe184d8f0d2969348ad42354297c},
journal = {Phys. Rev. Lett.},
keywords = {a},
month = {06},
number = 26,
numpages = {8},
pages = 266201,
publisher = {American Physical Society},
timestamp = {2024-06-26T10:30:51.000+0200},
title = {Helical topological superconducting pairing at finite excitation energies},
url = {https://link.aps.org/doi/10.1103/PhysRevLett.132.266201},
volume = 132,
year = 2024
}