Quantum transport of a spin-1 chiral fermion

TL;DR

This paper investigates quantum transport in a 3D spin-1 chiral fermion system, revealing unique impurity effects and conductivity behavior due to its flat band structure, differing from Weyl fermions.

Contribution

It provides a theoretical analysis of impurity effects on transport in spin-1 chiral fermions, highlighting distinct features from Weyl fermions.

Findings

Peak structure in density of states

Suppressed conductivity near zero energy

Conductivity less dependent on impurity concentration

Abstract

We theoretically study the quantum transport in a three-dimensional spin-1 chiral fermion system in the presence of impurity scattering. Within the self-consistent Born approximation, we find peak structure of the density of states and significant suppression of electrical conductivity around the zero energy. The zero-energy conductivity depends less on impurity concentration, unlike a Weyl fermion. These properties originate from the flat band structure of spin-1 chiral fermion.