Electron scattering in tantalum monoarsenide

Abstract

We report comprehensive studies of the single crystal growth and electrical transport properties for various samples of TaAs, the first experimentally confirmed inversion symmetry-breaking Weyl semimetal. The transport parameters for different samples are obtained through the fitting of the two band model and the analysis of Shubnikov de Haas oscillations. We find that the ratio factor of transport lifetime to quantum lifetime is intensively enhanced when the Fermi level approaches the Weyl node. This result is consistent with the side-jump interpretation derived from a chirality-protected shift in the scattering process for a Weyl semimetal.Comment: This is a modified version of arXiv:1502.0025

Global phase diagram of disordered type-II Weyl semimetals

“…Normally, these two time scales are of the same order for most 3D materials 37 . However, experiments have shown that the ratio between transport lifetime and quantum lifetime is extremely large (∼ 10 2 ) for WSM1 40 when Fermi level approaches the Weyl nodes. Noticing that WSM2 possesses longer localization length (along the direction of tilt) and shorter quantum lifetime (see Fig.…”

Single Crystal Growth, Resistivity, and Electronic Structure of the Weyl Semimetals NbP and TaP

“…Angle resolved photoemission spectroscopy (ARPES) experiments revealed Fermi arcs on the surface and Weyl fermion cones and Weyl nodes in the bulk of the sample [5,7,8]. Furthermore, TaAs exhibits gigantic magnetoresitance of 5.4 × 10 4 % at 10 K upon application of a 9 T magnetic field, and a large mobility of 5 × 10 5 cm 2 ·V −1 ·s −1 [9]. Similar properties have also been reported in NbP, with magnetoresistance of 8.5 × 10 4 % at 2 K and 9 T, and mobility of 5 × 10 6 cm 2 ·V −1 ·s −1 [10].…”

Chiral magnetic plasmons in anomalous relativistic matter

“…(49) originate from the topological correction δj given by Eq. (20). Note also that the correction to the velocity δv stems from the oscillating magnetic field in the energy dispersion (32) and is equal to…”

“…In the following, therefore, we will assume that the field B 5 is weak or, in other words, thatà 5 is negligible compared to the chiral shift b. Then, it is justified to replace (19) and (20). It is worth noting that the topological correction (17) plays an important role even without pseudoelectromagnetic fields.…”

“…The Weyl semimetal phase was first predicted theoretically to be realized in pyrochlore iridates [19]. It was discovered later in such compounds as TaAs, TaP, NbAs, NbP, Mo x W 1−x Te, and YbMnBi 2 [10,[20][21][22][23][24].…”