Dirac nodal arc in 1T-VSe2

Yilmaz, Turgut; Jiang, Xuance; Lu, Deyu; Sheverdyaeva, Polina M.; Matetskiy, Andrey V.; Moras, Paolo; Mazzola, Federico; Vobornik, Ivana; Fujii, Jun; Evans-Lutterodt, Kenneth; Vescovo, Elio

doi:10.1038/s43246-023-00376-1

Title: Dirac nodal arc in 1T-VSe₂

Journal Article · Fri Jun 23 00:00:00 EDT 2023 · Communications Materials

DOI:https://doi.org/10.1038/s43246-023-00376-1· OSTI ID:1992873

^[1]; Jiang, Xuance ^[2];

^[3]; Sheverdyaeva, Polina M. ^[4];

^[4];

^[5]; Vobornik, Ivana ^[6];

^[6]; Evans-Lutterodt, Kenneth ^[1]; Vescovo, Elio ^[1]

Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Stony Brook Univ., NY (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Consiglio Nazionale delle Ricerche (CNR) (Italy). Inst. of Structure of Matter (ISM)
Ca' Foscari University of Venice (Italy); Consiglio Nazionale delle Ricerche (CNR) (Italy). Institute of Materials (IOM)
Consiglio Nazionale delle Ricerche (CNR) (Italy). Institute of Materials (IOM)

Transition metal dichalcogenides exhibit many fascinating properties including superconductivity, magnetic orders, and charge density wave. The combination of these features with a non-trivial band topology opens the possibility of additional exotic states such as Majorana fermions and quantum anomalous Hall effect. Here, we report on photon-energy and polarization dependent spin-resolved angle-resolved photoemission spectroscopy experiments on single crystal 1T-VSe₂, revealing an unexpected band inversion and emergent Dirac nodal arc with spin-momentum locking. Density functional theory calculations suggest a surface lattice strain could be the driving mechanism for the topologically nontrivial electronic structure of 1T-VSe₂.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704

OSTI ID:: 1992873

Report Number(s):: BNL-224612-2023-JAAM

Journal Information:: Communications Materials, Vol. 4, Issue 1; ISSN 2662-4443

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Dirac nodal arc in 1T-VSe₂