Normal-state negative longitudinal magnetoresistance and Dirac-cone-like dispersion in PtPb4single crystals: A potential Weyl-semimetal superconductor candidate
Journal
New Journal of Physics
Journal Volume
23
Journal Issue
9
Date Issued
2021
Author(s)
Abstract
Magnetotransport measurements of PtPb4 single crystals with the T c of ?2.80 K reveal pronounced exotic topological nature. An anomalous negative longitudinal magnetoresistance (MR) related to the chiral anomaly and a linear-like transverse MR examined within the framework of quantum MR theory were studied. Results indicate the presence of chiral-anomaly-induced quantum transport associated with the Weyl states and show a Dirac-cone-like band dispersion in PtPb4. This work reveals the drastic impact of the concept that the surface electrons in a Weyl fermion state may dominate the normal-state magnetotransport in PtPb4, leading to the conclusion that PtPb4 can be a Weyl-semimetal superconductor candidate. ? 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
Subjects
chiral anomaly; quantum magnetoresistance; topological superconductor; Weyl semimetal; Dispersions; Magnetoresistance; Platinum compounds; Quantum chemistry; Quantum theory; Single crystals; Superconducting materials; Chiral anomaly; Dirac cones; Longitudinal magnetoresistance; Magneto-transport measurement; Measurements of; Normal state; Quantum magnetoresistance; Topological superconductor; Transverse magnetoresistance; Weyl semimetal; Topology
Type
journal article