Quantum Solid Phase and Coulomb Drag in 2D Electron–Electron Bilayers of MoS2

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Author(s)Huang, Meizhen
Author(s)Wu, Zefei
Author(s)Wang, Ning
Author(s)Chui, Siu-Tat
Date Accessioned2023-04-06T13:33:49Z
Date Available2023-04-06T13:33:49Z
Publication Date2023-03-10
DescriptionThis article was originally published in Advanced Electronic Materials. The version of record is available at: https://doi.org/10.1002/aelm.202201105
AbstractCoulomb drag experiments can give information about the interaction state of double-layer systems. Here, anomalous Coulomb drag behaviors are demonstrated in a 2D electron–electron bilayer system constructed by stacking atomically thin MoS2 on opposite sides of thin dielectric layers of boron nitride. In the low-temperature regime, the measured drag resistance does not follow the behavior predicted by the Coulomb drag models of exchanging momenta and energies with the particles in Fermi-liquid bilayer systems. Instead, it shows an upturn to higher and higher values. Quantum solid/fluid phases and the Kosterlitz–Thouless/Wigner 2D quantum melting transition are investigated in this bilayer system and this interesting phenomenon is described based on thermally activated carriers of quantum defects from the formation of the correlation-induced electron solid phases, with enhanced stabilization by the potential due to the boron nitride dielectric layers.
SponsorM.H. and Z.W. contributed equally to this work. The authors are grateful to the technical support from Dr. Yuan Cai and Mr. Gordon Suen from the Materials Characterization and Preparation Facility at the Hong Kong University of Science and technology. This work was supported by grants from the National Key R&D Program of China (grant No. 2020YFA 0309600) and the Hong Kong Research Grants Council (Project Nos. 16302621, AoE/P-701/20 and C6025-19G). S.T.C. is partly supported by the Bartol 1/N fund for his visit to the HKUST.
CitationHuang, M., Wu, Z., Wang, N., Chui, S.-T., Quantum Solid Phase and Coulomb Drag in 2D Electron–Electron Bilayers of MoS2. Adv. Electron. Mater. 2023, 9, 2201105. https://doi.org/10.1002/aelm.202201105
ISSN2199-160X
URLhttps://udspace.udel.edu/handle/19716/32630
Languageen_US
PublisherAdvanced Electronic Materials
KeywordsCoulomb drag
Keywordsquantum solids
Keywordstransition metal dichalcogenides
KeywordsWigner solids
TitleQuantum Solid Phase and Coulomb Drag in 2D Electron–Electron Bilayers of MoS2
TypeArticle
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