Observation of Dirac Charge-Density Waves in BiTeSe

Overview

Journal Nanomaterials (Basel)

Date 2023 Feb 11

PMID 36770437

Authors

Adrian Ruckhofer

Giorgio Benedek

Martin Bremholm

Wolfgang E Ernst

Anton Tamtogl

Affiliations

Soon will be listed here.

Abstract

While parallel segments in the Fermi level contours, often found at the surfaces of topological insulators (TIs), would imply "strong" nesting conditions, the existence of charge-density waves (CDWs)-periodic modulations of the electron density-has not been verified up to now. Here, we report the observation of a CDW at the surface of the TI Bi2Te2Se(111), below ≈350K, by helium-atom scattering and, thus, experimental evidence for a CDW involving Dirac topological electrons. Deviations of the order parameter observed below 180K, and a low-temperature break of time reversal symmetry, suggest the onset of a spin-density wave with the same period as the CDW in the presence of a prominent electron-phonon interaction, originating from Rashba spin-orbit coupling.

Citing Articles

The Electron-Phonon Interaction at Vicinal Metal Surfaces Measured with Helium Atom Scattering.

Benedek G, Miret-Artes S, Manson J, Toennies J Nanomaterials (Basel). 2023; 13(23).

PMID: 38063693 PMC: 10707727. DOI: 10.3390/nano13232997.

Surface properties of 1T-TaS and contrasting its electron-phonon coupling with TlBiTe from helium atom scattering.

Maier P, Hourigan N, Ruckhofer A, Bremholm M, Tamtogl A Front Chem. 2023; 11:1249290.

PMID: 38033467 PMC: 10687202. DOI: 10.3389/fchem.2023.1249290.

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