Work

Quantum oscillation study of the large magnetoresistance in Mo substituted WTe 2 single crystals

Year: 2024

Type: article

Abstract: The list of interesting electrical properties exhibited by transition metal dichalcogenides has grown with the discovery of extremely large magnetoresistance (MR) and type-II Weyl semimetal behavior in WTe 2 and MoTe 2 . The extremely large MR in WTe 2 is still not adequately understood. Here, we systematically study the effect of Mo substitution on the quantum oscillations in the MR in WTe 2 . The MR decreases with Mo substitution, however, the carrier concentrations extracted from the quantum oscillations show that the charge compensation improves. We believe that earlier interpretations based on the two-band theory, which attribute the decrease in MR to charge imbalance, could be incorrect due to overparametrization. We attribute the decrease in MR in the presence of charge compensation to a fall in transport mobility, which is evident from the residual resistivity ratio data. The quantum scattering time and the effective masses do not change within experimental errors upon substitution. Published by the American Physical Society 2024

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.110.155113

Authors: Sourabh Barua, M. R. Lees, G. Balakrishnan, P. A. Goddard

Institution: University of Warwick

Language: English

Topic: 2D Materials and Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Funder: Engineering and Physical Sciences Research Council

Awards: Single Crystal Growth at Warwick, G2955063823, G3773821690, G5172586099, Topological Insulators: A study of bulk crystalline and Nanomaterials