Nontrivial Metallic State of Molybdenum Disulfide

Abstract

The electrical conductivity and Raman spectroscopy measurements have been performed on MoS${}_2$ at high pressures up to 90 GPa and variable temperatures down to 5 K. We find that the temperature dependence of the resistance in a metallic 2H${}_a$ phase has an anomaly (a hump) which shifts with pressure to higher temperature. Concomitantly, a new Raman phonon mode appears in the metallic state suggesting that the electrical resistance anomaly may be related to a structural transformation. We suggest that this anomalous behavior is due to a charge density wave state, the presence of which is indicative for a possibility for an emergence of superconductivity at higher pressures.

arXiv comment6 pages, 4 figures

References in corpus (21)

• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Atomically thin MoS2: A new direct-gap semiconductor
• Two Dimensional Atomic Crystals
• Ultrahigh electron mobility in suspended graphene
• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Control of valley polarization in monolayer MoS2 by optical helicity
• Valley polarization in MoS2 monolayers by optical pumping
• Valley contrasting physics in graphene: magnetic moment and topological transport
• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
• Titanic Magnetoresistance in WTe2
• Phonons in single and few-layer MoS2 and WS2
• Superconductivity in Weyl Semimetal Candidate MoTe2
• Magnetic-field-induced charge-stripe order in the high temperature superconductor YBa2Cu3Oy
• Fermi surface nesting and the origin of Charge Density Waves in metals
• Evidence for an excitonic insulator phase in 1T-TiSe${}_2$
• CDW, Superconductivity and Anomalous Metallic Behavior in 2D Transition Metal Dichalcogenides
• Amplitude `Higgs' mode in 2H-NbSe2 Superconductor
• Possible Topological Superconducting Phases of MoS${}_2$
• Structure change, layer sliding, and metallization in high-pressure MoS${}_2$
• Chiral charge order in the superconductor 2H-TaS2
• Charge Order in NbSe${}_2$

Cited by in corpus (6)

• Emergent superconductivity in two-dimensional NiTe${}_2$ crystals
• Evidence of ideal excitonic insulator in bulk MoS2 under pressure
• Enhancement of the superconducting transition temperature by Re doping in Weyl semimetal MoTe${}_2$
• Coexisting 1T/2H polymorphs, reentrant resistivity behavior, and charge distribution in MoS2-hBN 2D/2D composite thin films
• Anomalous metallic phase in molybdenum disulphide induced via gate-driven organic ion intercalation
• Field induced hysteretic structural phase switching and possible CDW in Re-doped MoTe${}_2$