Jolie, Wouter, Knispel, Timo, Ehlen, Niels, Nikonov, Konstantin, Busse, Carsten ORCID: 0000-0001-5522-0578, Grueneis, Alexander and Michely, Thomas (2019). Charge density wave phase of VSe2 revisited. Phys. Rev. B, 99 (11). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

Full text not available from this repository.

Abstract

Scanning tunneling microscopy and spectroscopy are used to image the charge density wave at the surface of cleaved VSe2 and to probe its local density of states at 5 K. The main features in the spectrum are linked to the contributions of the p-like and d-like bands of VSe2 found in angle-resolved photoemission spectroscopy and tight-binding calculations. Different from previous tunneling spectroscopy work, we find a narrow partial gap at the Fermi level that we associate with the charge density wave phase. The energy scale of the gap found in the experiment is in good agreement with the charge density wave transition temperature of VSe2, under the assumption of weak electron-phonon coupling, consistent with the Peierls model of Fermi surface nesting. The role of defects is investigated, which reveals that the partial gap in the density of states and hence the charge density wave itself is extremely stable, though the order, phase, and amplitude of the charge density waves on the surface are strongly perturbed by defects.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Jolie, WouterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knispel, TimoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ehlen, NielsUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nikonov, KonstantinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Busse, CarstenUNSPECIFIEDorcid.org/0000-0001-5522-0578UNSPECIFIED
Grueneis, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Michely, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-153904
DOI: 10.1103/PhysRevB.99.115417
Journal or Publication Title: Phys. Rev. B
Volume: 99
Number: 11
Date: 2019
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SCANNING-TUNNELING-MICROSCOPY; PERIODIC LATTICE DISTORTION; VANADIUM DISELENIDE; DICHALCOGENIDES; SPECTROSCOPY; DIFFRACTION; TRANSPORT; DEFECTS; GROWTHMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/15390

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item