Observation of second sound in graphite at temperatures above 100 K

Abstract

Between the two extremes of ballistic and diffusive lattice thermal transport is the potential for an exotic wave-like state known as second sound. Huberman et al. used fast, transient thermal grating measurements to show the existence of second sound in graphite between 85 and 125 kelvin (see the Perspective by Shi). Previous observations of second sound have been rare, confined to isotopically pure materials at very low temperatures. The observation of second sound in graphite is likely due to its layered nature, suggesting that this thermal transport mode may be accessible in other two-dimensional materials.

Document Details

Document Type
Pub Defense Publication
Publication Date
Apr 26, 2019
Source ID
10.1126/science.aav3548

Entities

People

  • A. A. Maznev
  • Bai Song
  • Gang Chen
  • Ke Chen
  • Keith A. Nelson
  • Ryan A. Duncan
  • Samuel Huberman
  • V. Chiloyan
  • Zhiwei Ding

Organizations

  • Massachusetts Institute of Technology
  • National Science Foundation
  • Office of Naval Research
  • United States Department of Energy

Tags

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thermal Physics or Thermal Science.