Open AccessOrigin of exceptional magneto-resistance in Weyl semimetal TaSb2
Author(s) -
Pawan Kumar,
Sudesh,
S. Patnaik
Publication year - 2019
Publication title -
journal of physics communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.407
H-Index - 17
ISSN - 2399-6528
DOI - 10.1088/2399-6528/ab51a2
Subject(s) - electrical resistivity and conductivity , condensed matter physics , semimetal , weyl semimetal , magnetic field , hall effect , magneto , plateau (mathematics) , landau quantization , magnetoresistance , materials science , physics , band gap , magnet , quantum mechanics , mathematics , mathematical analysis
We study magneto-transport properties in single crystals of TaSb 2, which is a topological semimetal. In the presence of magnetic field, the electrical resistivity shows onset of insulating behaviour followed by a plateau at low temperature. Such resistivity saturation is generally assigned to topological surface states but we find that aspects of extremely large magneto resistance and resistivity plateau are well accounted by classical Kohler’s scaling. In addition, magneto-resistance in TaSb 2 shows non-saturating field dependence. Evidence for anomalous Chiral transport is provided with observation of negative longitudinal magneto-resistance. Shubnikov-de Haas oscillation data reveal two dominating frequencies, 201 T and 455 T. At low temperature, the field dependence of Hall resistivity shows non-linear behaviour that indicates the presence of two types of charge carriers in consonance with reported electronic band structure. Analysis of Hall resistivity implies extremely high electron mobility.