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Characterization of Thermal Transport in One-dimensional Solid Materials
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Pseudo-Landau Thermal Diffusion.

Jun Guo1, Guoqiang Xu2,3, Mengqi Liu1,4

  • 1National University of Singapore, Department of Electrical and Computer Engineering, Kent Ridge 117583, Singapore.

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Summary

Researchers created a synthetic gauge field to achieve Landau quantization in systems with dissipation. This led to the observation of a quantum thermal Hall-like effect, opening new avenues in heat transfer manipulation and non-Hermitian physics.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Phenomena
  • Non-Hermitian Physics

Background:

  • Landau quantization is crucial for quantum phenomena in 2D systems, typically requiring magnetic fields.
  • Dissipation and the lack of pseudomagnetic fields in thermal diffusion hinder Landau quantization observation.

Purpose of the Study:

  • To develop a method for achieving Landau quantization in dissipative systems.
  • To explore quantum thermal Hall-like effects in the presence of dissipation.

Main Methods:

  • Creating a synthetic gauge field to act as a pseudomagnetic field.
  • Achieving Landau quantization on both real and imaginary spectra.
  • Experimentally observing the quantum thermal Hall-like effect.

Main Results:

  • Identified complex pseudo-Landau levels as isometric ladders on real and imaginary spectra.
  • Observed a macroscopic quantum thermal Hall-like effect induced by dissipation.
  • Demonstrated a plateaulike effective thermal resistance.

Conclusions:

  • The study provides a novel method for Landau quantization in dissipative systems.
  • Findings offer a new paradigm for heat transfer control.
  • Established a platform for exploring dissipative non-Hermitian physics.