Helical Topological Superconducting Pairing at Finite Excitation Energies

Autor:	Bahari, Masoud, Zhang, Song-Bo, Li, Chang-An, Choi, Sang-Jun, Rüßmann, Philipp, Timm, Carsten, Trauzettel, Björn
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Strongly Correlated Electrons Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. Lett. 132, 266201 (2024)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.132.266201
Popis:	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 two-fold rotation symmetry. We suggest concrete materials in which this phenomenon could be observed. Comment: 7 + 16 pages, 8 figures, and 3 tables
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2210.11955 Zobrazit plný text záznamu View this record from Arxiv