Extremely high conductivity observed in the triple point topological metal MoP

TL;DR

This study reports ultra-high electrical conductivity in MoP, a triple point topological metal, with remarkably low resistivity, long mean free path, and unique scattering properties, highlighting its potential for advanced electronic applications.

Contribution

The paper demonstrates the observation of extremely high conductivity in MoP, a recently identified triple point fermion material, with detailed analysis of its electronic transport and scattering phenomena.

Findings

Resistivity of 6 n-ohm cm at 2 K

Mean free path of 11 microns

Non-saturating magnetoresistance up to 9 T

Abstract

Weyl and Dirac fermions have created much attention in condensed matter physics and materials science. Recently, several additional distinct types of fermions have been predicted. Here, we report ultra-high electrical conductivity in MoP at low temperature, which has recently been established as a triple point Fermion material. Here we show that the electrical resistivity is 6 n-ohm cm at 2 K with a large mean free path of 11 microns. de Haas-van Alphen oscillations reveal spin splitting of the Fermi surfaces. In contrast to noble metals with similar conductivity and number of carriers, the magnetoresistance in MoP does not saturate up to 9 T at 2 K. Interestingly, the momentum relaxing time of the electrons is found to be more than 15 times larger than the quantum coherence time. This difference between the scattering scales shows that momentum conserving scattering dominates in MoP at low temperatures.