Work

Topological quadrupolar semimetals

Year: 2018

Type: article

Abstract: Conventional topological semimetals are characterized by the energy momentum separation of the bulk nodes in the energy spectrum. Here, the authors demonstrate a few types of topological semimetals that are gapped in the bulk, but host one or a half of a Dirac semimetal on multiple surfaces. They show that these semimetals can be characterized by the bulk nodes in the hybrid Wannier spectrum, rather than the energy spectrum. This works points to a new direction in studying the higher order topology in semimetallic systems.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.98.241103

Authors: Mao Lin, Taylor L. Hughes

Institutions: University of Illinois Urbana-Champaign, Anthony J. Leggett Institute for Condensed Matter Theory

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: National Science Foundation

Awards: EFRI NewLAW: Reconfigurable pathways and directionality for sound using time-varying engineered materials, CAREER: Interplay of topology and geometry in materials with strong spin-orbit coupling