City Research Online

Superconductivity from piezoelectric interactions in Weyl semimetals

Pereira, R. G., Buccheri, F., De Martino, A. ORCID: 0000-0002-3656-0419 & Egger, R. (2019). Superconductivity from piezoelectric interactions in Weyl semimetals. Physical Review B, 100(3), article number 035106. doi: 10.1103/physrevb.100.035106

Abstract

We present an analytical low-energy theory of piezoelectric electron-phonon interactions in undoped Weyl semimetals, taking into account also Coulomb interactions. We show that piezoelectric interactions generate a long-range attractive potential between Weyl fermions. This potential comes with a characteristic angular anisotropy. From the one-loop renormalization group approach and a mean-field analysis, we predict that superconducting phases with either conventional s-wave singlet pairing or nodal-line triplet pairing could be realized for sufficiently strong piezoelectric coupling. For small couplings, we show that the quasiparticle decay rate exhibits a linear temperature dependence where the prefactor vanishes only in a logarithmic manner as the quasiparticle energy approaches the Weyl point. For practical estimates, we consider the Weyl semimetal TaAs.

Publication Type: Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments: School of Science & Technology > Mathematics
School of Health & Psychological Sciences > Healthcare Services Research & Management > Food Policy
SWORD Depositor:
[thumbnail of 1904.06433v2.pdf]
Preview
Text - Accepted Version
Download (2MB) | Preview

Export

Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email

Downloads

Downloads per month over past year

View more statistics

Actions (login required)

Admin Login Admin Login