Work

Geometrical effects in orbital magnetic susceptibility

Year: 2015

Type: article

Abstract: Within the wave-packet semiclassical approach, the Bloch electron energy is derived to second order in the magnetic field and classified into gauge-invariant terms with clear physical meaning, yielding a fresh understanding of the complex behavior of orbital magnetic susceptibility. The Berry curvature and quantum metric of the Bloch states give rise to a geometrical magnetic susceptibility, which can be dominant when bands are filled up to a small energy gap. There is also an energy polarization term, which can compete with the Peierls-Landau and Pauli magnetism on a Fermi surface. All these, and an additional Langevin susceptibility, can be calculated from each single band, leaving the Van Vleck susceptibility as the only term truly from interband coupling.

Source: Physical Review B

DOI: 10.1103/physrevb.91.214405

Authors: Yang Gao, Shengyuan A. Yang, Qian Niu

Institutions: The University of Texas at Austin, Singapore University of Technology and Design, Peking University

Language: English

Topic: Topological Materials and Phenomena

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Welch Foundation, National Natural Science Foundation of China, Singapore University of Technology and Design

Awards: TRANSPORT AND COLLECTIVE PROPERTIES OF DILUTED MAGNETIC SEMICONDUCTOR MULTILAYERS AND NANOSTRUCTURES, G180116121, G2880211908, G4238136646, G8227804054