In:
Chinese Physics Letters, IOP Publishing, Vol. 37, No. 9 ( 2020-09-01), p. 090301-
Kurzfassung:
The Weyl semimetal has emerged as a new topologically nontrivial phase of matter, hosting low-energy excitations of massless Weyl fermions. Here, we present a comprehensive study of a type-II Weyl semimetal WP 2 . Transport studies show a butterfly-like magnetoresistance at low temperature, reflecting the anisotropy of the electron Fermi surfaces. This four-lobed feature gradually evolves into a two-lobed variant with an increase in temperature, mainly due to the reduced relative contribution of electron Fermi surfaces compared to hole Fermi surfaces for magnetoresistance. Moreover, an angle-dependent Berry phase is also discovered, based on quantum oscillations, which is ascribed to the effective manipulation of extremal Fermi orbits by the magnetic field to feel nearby topological singularities in the momentum space. The revealed topological character and anisotropic Fermi surfaces of the WP 2 substantially enrich the physical properties of Weyl semimetals, and show great promises in terms of potential topological electronic and Fermitronic device applications.
Materialart:
Online-Ressource
ISSN:
0256-307X
,
1741-3540
DOI:
10.1088/0256-307X/37/9/090301
Sprache:
Unbekannt
Verlag:
IOP Publishing
Publikationsdatum:
2020
ZDB Id:
2040565-0
SSG:
6,25