Year: 2024
Type: article
Abstract: Confinement of 2D massless Dirac fermions by a mass boundary does not produce an edge mode. This applies to the surface of a 3D topological insulator at an interface to a magnetic insulator with a perpendicular magnetization. Surprisingly enough, an edge mode does appear if the magnetization is tilted away from the normal. The edge mode is an ``arc state'', ranging over a finite momentum interval, as a 2D analogue of the surface Fermi arc familiar from 3D Weyl semimetals.
Author: C. W. J. Beenakker
Institution: Leiden University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: European Commission, Horizon 2020
Award: G434337789
OpenAlex ID: W4403456848