Work

Semiclassical transport in two-dimensional Dirac materials with spatially variable tilt

Year: 2024

Type: article

Abstract: We use Boltzmann theory to study the semi-classical dynamics of electrons in a two-dimensional (2D) tilted Dirac material in which the tilt varies in space. The spatial variation of the tilt parameter induces a non-trivial spacetime geometry on the background of which the electrons roam about. As the first manifestation of gravito-electric phenomena, we find a geometric planar Hall effect according to which a current flows in a direction transverse to the chemical potential gradient and is proportional to g x y component of the emergent spacetime structure. The longitudinal conductivity contains information about the gravitational red-shift factors. Furthermore, in the absence of externally applied electric field there can be “free-fall” or zero-bias currents that can be used as detectors of terahertz radiation.

Source: Annals of Physics

DOI: 10.1016/j.aop.2024.169838

Authors: Abolfath Hosseinzadeh, S.A. Jafari

Institutions: Shahed University, Forschungszentrum Jülich, RWTH Aachen University

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,770

Funders: Alexander von Humboldt-Stiftung, Sharif University of Technology