Charge Density Waves in Electron-Doped Molybdenum Disulfide.

ABSTRACT: We present the discovery of a charge density wave (CDW) ground state in heavily electron-doped molybdenum disulfide (MoS₂). This is the first observation of a CDW in any d² (column 6) transition metal dichalcogenide (TMD). The band structure of MoS₂ is distinct from the d⁰ and d¹ 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 sta

SUBMITTER: Bin Subhan MK 

PROVIDER: S-EPMC8397392 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature