Room-Temperature Electron-Hole Liquid in Monolayer MoS2

Abstract

Excitons in semiconductors are usually non interacting and behave like an ideal gas, but may condense to a strongly correlated liquid like state, i.e. electron hole liquid (EHL), at high density and appropriate temperature. EHL is a macroscopic quantum state with exotic properties and represents the ultimate attainable charge excitation density in steady states. It bears great promise for a variety of fields such as ultrahigh power photonics and quantum science and technology. However, the condensation of gas like excitons to EHL has often been restricted to cryogenic temperatures, which significantly limits the prospect of EHL for use in practical applications. Herein we demonstrate the formation of EHL at room temperature in monolayer MoS2 by taking advantage of the monolayer's extraordinarily strong exciton binding energy. This work demonstrates the potential for the liquid like state of charge excitations to be a useful platform for the studies of macroscopic quantum phenomena and the development of optoelectronic devices.

References in corpus (11)

• Atomically thin MoS2: A new direct-gap semiconductor
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• Charge-tuneable biexciton complexes in monolayer WSe${}_2$
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• Exciton Liquid in Coupled Quantum Wells
• Enhancing Multifunctionalities of Transition Metal Dichalcogenide Monolayers via Intercalation of Molecules and Ions

Cited by in corpus (18)

• Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
• Exciton optics, dynamics and transport in atomically thin semiconductors
• Theoretical phase diagram for the room temperature Electron-Hole Liquid in photo-excited quasi-2D monolayer MoS${}_2$
• Measuring valley polarization in two-dimensional materials with second-harmonic spectroscopy
• Modulation of trion and exciton formation in monolayer WS2 by dielectric and substrate engineering
• Strain-induced activation of chiral-phonon emission in monolayer WS${}_2$
• Mott materials: unsuccessful metals with a bright future
• Fermi Liquid Theory Sheds Light on "Hot" EHL in 1L-MoS${}_2$
• Halide perovskite artificial solids as a new platform to simulate collective phenomena in doped Mott insulators
• Electron-Hole Liquid in Monolayer Transition Metal Dichalcogenide Heterostructures
• Momentum-Resolved Signatures of Carrier Screening Effects on Electron-Phonon Coupling in MoS${}_2$
• Trapping Interlayer Excitons in van der Waals Heterostructures by Potential Arrays
• Phase diagram of electron-hole liquid in monolayer heterostructures based on transition metal dichalcogenides
• Charge-separated electron-hole liquid in transition metal dichalcogenide heterostructures
• Exciton Mott Transition in Two-Dimensional Semiconductors
• Non-Equilibrium First-Order Exciton Mott Transition at Monolayer Lateral Heterojunctions Visualized by Ultrafast Microscopy
• Sub-tesla on-chip nanomagnetic metamaterial platform for angle-resolved photoemission spectroscopy
• Reversible engineering the spin-orbit coupling of monolayer MoS2 via laser irradiation under controlled gas atmospheres