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Updated: May 7, 2025

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Possible Sliding Regimes in Twisted Bilayer WTe_{2}.

Yi-Ming Wu1, Chaitanya Murthy2,3, Steven A Kivelson3

  • 1Stanford Institute for Theoretical Physics, <a href="https://ror.org/00f54p054">Stanford University</a>, Stanford, California 94305, USA.

Physical Review Letters
|January 3, 2025
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Summary
This summary is machine-generated.

We theoretically explore exotic sliding regimes in twisted WTe2 bilayers. Hole-doped twisted WTe2 exhibits a Luther-Emery liquid, consistent with experiments, while electron-doped systems show potential for novel charge-density-wave and superconducting phases.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science

Background:

  • Twisted transition metal dichalcogenides (tTMDs) exhibit rich electronic properties.
  • One-dimensional (1D) behavior is observed in twisted WTe2 (tWTe2) at low temperatures.

Purpose of the Study:

  • Theoretically investigate exotic sliding regimes in tWTe2.
  • Explore potential electronic phases in both hole- and electron-doped tWTe2.
  • Analyze dimensional crossovers and interwire transport phenomena.

Main Methods:

  • Theoretical modeling of coupled one-dimensional electron gases (1DEGs).
  • Analysis of different doping regimes (hole vs. electron) and their implications.
  • Consideration of interwire couplings and their effects on electronic phases.

Main Results:

  • Hole-doped tWTe2 behaves as coupled two-flavor 1DEGs.
  • Electron-doped tWTe2 acts as coupled four-flavor 1DEGs, enabling novel phases.
  • Identified potential for 4kF charge-density-wave and charge-4e superconductivity in electron-doped systems.
  • A sliding Luther-Emery liquid model aligns with experimental observations in hole-doped tWTe2.

Conclusions:

  • tWTe2 offers a platform for realizing diverse 1D electronic phases.
  • The interplay of doping, dimensionality, and interwire coupling dictates emergent phenomena.
  • Theoretical findings provide a framework for understanding and predicting tWTe2 behavior.