Journal Article

PUBDB-2021-02892

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Charge Density Waves in Electron-Doped Molybdenum Disulfide

Bin Subhan, M. K. ; Suleman, A. ; Moore, G. ; Phu, P. ; Hoesch, M.DESY* ; Kurebayashi, H. ; Howard, C. A. (Corresponding author) ; Schofield, S. R. (Corresponding author)

2021
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.nanolett.1c00677  doi:10.3204/PUBDB-2021-02892

Abstract: We present the discovery of a charge density wave (CDW) ground state in heavily electron-doped molybdenum disulfide (MoS$_2$). This is the first observation of a CDW in any d$^2$ (column 6) transition metal dichalcogenide (TMD). The band structure of MoS$_2$ is distinct from the d$^0$ and d$^1$ TMDs in which CDWs have been previously observed, facilitating new insight into CDW formation. We demonstrate a metal–insulator transition at 85 K, a 25 meV gap at the Fermi level, and two distinct CDW modulations, (2√3 × 2√3) R30° and 2 × 2, attributable to Fermi surface nesting (FSN) and electron–phonon coupling (EPC), respectively. This simultaneous exhibition of FSN and EPC CDW modulations is unique among observations of CDW ground states, and we discuss this in the context of band folding. Our observations provide a route toward the resolution of controversies surrounding the origin of CDW modulations in TMDs.

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Contributing Institute(s):

1. PETRA-S (FS-PETRA-S)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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