skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Theoretical Phase Diagram for the Room-Temperature Electron–Hole Liquid in Photoexcited Quasi-Two-Dimensional Monolayer MoS 2

Abstract

Strong correlations between electrons and holes can drive the existence of an electron–hole liquid (EHL) state, typically at high carrier densities and low temperatures. The recent emergence of quasi-two-dimensional (2D) monolayer transition metal dichalcogenides (TMDCs) provides ideal systems to explore the EHL state since ineffective screening of the out-of-plane field lines in these quasi-2D systems allows for stronger charge carrier correlations in contrast to conventional 3D bulk semiconductors and enables the existence of the EHL at high temperatures. Here we construct the phase diagram for the photoinduced first-order phase transition from a plasma of electron–hole pairs to a correlated EHL state in suspended monolayer MoS2. We show that the quasi-2D nature of monolayer TMDCs and the ineffective screening of the out-of-plane field lines allow for this phase transition to occur at and above room temperature, thereby opening avenues for studying many-body phenomena without the constraint of cryogenics.

Authors:
ORCiD logo [1];  [1]
  1. Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, United States
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1484742
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 18; Journal Issue: 1; Journal ID: ISSN 1530-6984
Country of Publication:
United States
Language:
English

Citation Formats

Rustagi, Avinash, and Kemper, Alexander F. Theoretical Phase Diagram for the Room-Temperature Electron–Hole Liquid in Photoexcited Quasi-Two-Dimensional Monolayer MoS 2. United States: N. p., 2017. Web. doi:10.1021/acs.nanolett.7b04377.
Rustagi, Avinash, & Kemper, Alexander F. Theoretical Phase Diagram for the Room-Temperature Electron–Hole Liquid in Photoexcited Quasi-Two-Dimensional Monolayer MoS 2. United States. doi:10.1021/acs.nanolett.7b04377.
Rustagi, Avinash, and Kemper, Alexander F. Tue . "Theoretical Phase Diagram for the Room-Temperature Electron–Hole Liquid in Photoexcited Quasi-Two-Dimensional Monolayer MoS 2". United States. doi:10.1021/acs.nanolett.7b04377. https://www.osti.gov/servlets/purl/1484742.
@article{osti_1484742,
title = {Theoretical Phase Diagram for the Room-Temperature Electron–Hole Liquid in Photoexcited Quasi-Two-Dimensional Monolayer MoS 2},
author = {Rustagi, Avinash and Kemper, Alexander F.},
abstractNote = {Strong correlations between electrons and holes can drive the existence of an electron–hole liquid (EHL) state, typically at high carrier densities and low temperatures. The recent emergence of quasi-two-dimensional (2D) monolayer transition metal dichalcogenides (TMDCs) provides ideal systems to explore the EHL state since ineffective screening of the out-of-plane field lines in these quasi-2D systems allows for stronger charge carrier correlations in contrast to conventional 3D bulk semiconductors and enables the existence of the EHL at high temperatures. Here we construct the phase diagram for the photoinduced first-order phase transition from a plasma of electron–hole pairs to a correlated EHL state in suspended monolayer MoS2. We show that the quasi-2D nature of monolayer TMDCs and the ineffective screening of the out-of-plane field lines allow for this phase transition to occur at and above room temperature, thereby opening avenues for studying many-body phenomena without the constraint of cryogenics.},
doi = {10.1021/acs.nanolett.7b04377},
journal = {Nano Letters},
number = 1,
volume = 18,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Save / Share: