Chiral anomaly induced nonlinear Nernst and thermal Hall effects in Weyl semimetals
Chuanchang Zeng, Snehasish Nandy, Sumanta Tewari
Abstract
The chiral anomaly (CA) is one the most remarkable topological properties in Weyl semimetals (WSMs). Here, the authors investigate the second-order nonlinear planar Nernst and thermal Hall effects in WSMs, manifested by thermal CA with coplanar thermal gradient and magnetic field. With intrinsic chiral chemical potential, these nonlinear effects can exist in WSMs with pairs of oppositely tilted or nontilted Weyl cones. Interestingly, their transport coefficients follow novel fundamental relations consistent with that of Berry-dipole-induced nonlinear effects.
Topics & Concepts
Berry connection and curvatureNernst effectPhysicsChiral anomalyNernst equationCondensed matter physicsWeyl semimetalHamiltonian (control theory)Hall effectQuantum mechanicsMagnetic fieldSemimetalGeometric phaseFermionElectrodeMathematical optimizationBand gapMathematicsTopological Materials and PhenomenaGraphene research and applications2D Materials and Applications