# Longitudinal negative magnetoresistance and magneto-transport phenomena in conventional and topological conductors

## TL;DR

This paper demonstrates that large negative longitudinal magnetoresistance, often linked to topological effects in Weyl and Dirac semimetals, can also occur in conventional conductors without topological protection, and discusses related magneto-transport phenomena.

## Contribution

It reveals that negative longitudinal magnetoresistance is not exclusive to topological materials and can appear in conventional conductors under certain conditions.

## Key findings

- Negative magnetoresistance can occur in conventional conductors.
- Magnetic field enhances thermal conductivity and thermoelectric tensors.
- Topological protection is not necessary for negative magnetoresistance.

## Abstract

Recently a large negative longitudinal (parallel to the magnetic field) magnetoresistance was observed in Weyl and Dirac semimetals. It is believed to be related to the chiral anomaly associated with topological electron band structure of these materials. We show that in a certain range of parameters such a phenomenon can also exist in conventional centrosymmetric and time reversal conductors, lacking topological protection of the electron spectrum and the chiral anomaly. We also discuss the magnetic field enhancement of the longitudinal components of the thermal conductivity and thermoelectric tensors.