Work

Nonlinear Hall Effect from Long-Lived Valley-Polarizing Relaxons

Year: 2024

Type: article

Abstract: The nonlinear Hall effect has attracted much attention due to the famous, widely adopted interpretation in terms of the Berry curvature dipole in momentum space. Using ab initio Boltzmann transport equations, we find a 60% enhancement in the nonlinear Hall effect of n-doped GeTe and its noticeable frequency dependence, qualitatively different from the predictions based on the Berry curvature dipole. The origin of these differences is long-lived valley polarization in the electron distribution arising from electron-phonon scattering. Our findings await immediate experimental confirmation.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.132.106402

Authors: Jae-Mo Lihm, Cheol-Hwan Park

Institutions: Seoul National University, Institute for Basic Science

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Seoul National University, Korea Institute of Science and Technology Information, National Research Foundation of Korea, Institute for Basic Science

Awards: G4223725145, G5487867785, G6673824303, G723530016