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Thermal transport for probing quantum materials

Published online by Cambridge University Press:  07 May 2020

Mingda Li
Affiliation:
Department of Nuclear Science and Engineering, Massachussetts Institute of Technology, USA; mingda@mit.edu
Gang Chen
Affiliation:
Department of Mechanical Engineering, Massachussetts Institute of Technology, USA; gchen2@mit.edu
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Abstract

In probing quantum materials, thermal transport is less appreciated than electrical transport. This article aims to show the pivotal role that thermal transport may play in understanding quantum materials—longitudinal thermal transport reflects itinerant quasiparticles, even in an electrical insulating phase, while transverse thermal transport such as the thermal Hall and Nernst effects is tightly linked to nontrivial topology. We discuss three examples—quantum spin liquids wherein thermal transport identifies its existence, superconductors wherein thermal transport reveals the superconducting gap structure, and topological Weyl semimetals where the anomalous Nernst effect is a consequence of nontrivial Berry curvature. We conclude with an outlook on the unique insights thermal transport may offer to probe a much broader category of quantum phenomena.

Information

Type
Emergent Quantum Materials
Copyright
Copyright © Materials Research Society 2020

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