Work

Geometrical Theory of the Shift Current in Presence of Disorder and Interaction

Year: 2024

Type: article

Abstract: The electric field of light induces-in a noncentrosymmetric insulator-a dc current, quadratic in the field magnitude, called the "shift current." When addressed from a many-electron viewpoint, the shift current has a simple explanation and a simple formulation as well, deeply rooted in quantum geometry. The basic formula is then specialized to the independent-electron case, first for a disordered system in a supercell formulation, and then for a crystalline system. In the latter case the known shift-current formula is retrieved in a very transparent way.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.133.206903

Author: Raffaele Resta

Institutions: Istituto Officina dei Materiali, Donostia International Physics Center

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

Funder: Office of Naval Research

Award: G1820669060