Work

Bulk and surface electron scattering in disordered Bi 2 Te 3 probed by quasiparticle interference

Year: 2025

Type: article

Abstract: We investigated the electronic properties of the topological insulator Bi 2 Te 3 by scanning tunneling microscopy and spectroscopy at low temperature. We obtained high-resolution quasiparticle interference data of the topological surface Dirac electrons at different energies. Spin-selective joint density of states calculations were performed for surface and bulk electronic states to interpret the observed quasiparticle interference data. The topological properties of our crystals are demonstrated by the absence of backscattering along with the linear energy dispersion of the dominant scattering vector. In addition, we detect nondispersive scattering modes which we associate with bulk-surface scattering and, thus, allow an approximate identification of the bulk energy gap range based on our quasiparticle interference data. Measurements of differential conductance maps in magnetic fields up to 15 T have been carried out, but no strong modifications could be observed.

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

DOI: 10.1103/physrevb.111.115111

Authors: V. Nagorkin, S. Schimmel, P. Gebauer, A. Isaeva, D. Baumann, A. Koitzsch, B. Büchner, C. Hess

Institutions: University of Wuppertal, Leibniz Institute for Solid State and Materials Research, Technische Universität Dresden, TU Dortmund University, Research Center Future Energy Materials and Systems, University of Amsterdam

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

Funders: Deutsche Forschungsgemeinschaft, European Research Council

OpenAlex ID: W4408253990

FWCI: 0.374

Cites: 36

Cited by: 1

Related to: 10