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Phonon-induced magnetoresistivity of Weyl semimetal nanowires

De Martino, A. ORCID: 0000-0002-3656-0419, Dorn, K., Buccheri, F. & Egger, R. (2021). Phonon-induced magnetoresistivity of Weyl semimetal nanowires. Physical Review B, 104(15), article number 155425. doi: 10.1103/physrevb.104.155425


We study longitudinal magnetotransport in disorder-free cylindrical Weyl semimetal nanowires. Our theory includes a magnetic flux φ piercing the nanowire and captures the finite curvature of the Fermi arc in the surface Brillouin zone through a boundary angle α. Electron backscattering by acoustic phonons via the deformation potential causes a finite resistivity which we evaluate by means of the semiclassical Boltzmann approach. We find that low-energy transport is dominated by surface states, where transport observables are highly sensitive to the angle α and to Aharonov-Bohm phases due to φ. A generic subband dispersion relation allows for either one or two pairs of Fermi points. In the latter case, intranode backscattering is possible and implies a parametrically larger resistivity than for a single Fermi point pair. As a consequence, large and abrupt resistivity changes take place across the transition points separating parameter regions with a different number of Fermi point pairs in a given subband.

Publication Type: Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments: School of Science & Technology > Mathematics
SWORD Depositor:
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