Magnus Nernst and thermal Hall effect

TL;DR

This paper explores the Magnus Nernst and thermal Hall effects caused by Berry curvature-induced Magnus velocity in 2D materials, demonstrating their existence in monolayer WTe2 and gapped bilayer graphene, and proposing potential applications.

Contribution

It introduces the concept of Magnus Nernst and thermal Hall effects and demonstrates their presence in specific 2D materials using semiclassical Boltzmann formalism, highlighting their experimental relevance.

Findings

Magnus Nernst and thermal Hall effects are demonstrated in monolayer WTe2 and gapped bilayer graphene.

Magnus velocity can induce a Magnus valley Hall effect in gapped graphene.

Magnus velocity provides a new way to probe Berry curvature experimentally.

Abstract

Motivated by the recent prediction of the Magnus Hall effect in systems with broken inversion symmetry, in this paper we study the Magnus Nernst effect and the Magnus thermal Hall effect. In presence of an in-built electric field, the self rotating wave-packets of electrons with finite Berry curvature generate a Magnus velocity perpendicular to both. This anomalous Magnus velocity gives rise to the Magnus Hall transport which manifests in all four electro-thermal transport coefficients. In this paper, we demonstrate the existence of the Magnus Nernst and Magnus thermal Hall effect in monolayer WTe2 and gapped bilayer graphene, using the semiclassical Boltzmann formalism. We show that the Magnus velocity can also give rise to Magnus valley Hall effect in gapped graphene. Magnus velocity can be useful for experimentally probing the Berry curvature, and design of novel electrical and electro-thermal devices.