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      Charge-Density-Wave Proximity Effects in Graphene

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          Abstract

          Certain layered transition metal dichalcogenides (TMDCs), such as 1T-TaS2, show a rich collection of charge density wave (CDW) phases at different temperatures, and their atomic structures and electron conductions have been widely studied. However, the properties of CDW systems that are integrated with other electronic materials have not yet been investigated. Here, we incorporate the CDW properties of TMDCs into the electronic transport of graphene for the first time. During CDW phase transitions, anomalous transport behaviors that are closely related to the formation of correlated disorder in TMDCs were observed in the graphene sample used in this study. In particular, the commensurate CDW phase forms a periodic charge distribution with potential fluctuations, and thus constitutes correlated charged impurities, which decreases resistivity and enhances carrier mobility in graphene. The CDW-graphene heterostructure system demonstrated here paves the way to controlling the temperature-dependent carrier mobility and resistivity of graphene and to developing novel functional electronic devices such as graphene-based sensors and memory devices.

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          Author and article information

          Journal
          13 January 2022
          Article
          2201.04844
          ad93ff7d-580d-427d-a33f-45c2d3ad8be0

          http://creativecommons.org/licenses/by/4.0/

          History
          Custom metadata
          31 pages, 9 figures
          cond-mat.mes-hall

          Nanophysics
          Nanophysics

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