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Published November 16, 2012 | Version Supplemental Material
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Coherent Phonon Heat Conduction in Superlattices

Creators

  • 1. ROR icon Massachusetts Institute of Technology
  • 2. ROR icon Boston University
  • 3. ROR icon California Institute of Technology
  • 4. ROR icon Boston College

Abstract

The control of heat conduction through the manipulation of phonons as coherent waves in solids is of fundamental interest and could also be exploited in applications, but coherent heat conduction has not been experimentally confirmed. We report the experimental observation of coherent heat conduction through the use of finite-thickness superlattices with varying numbers of periods. The measured thermal conductivity increased linearly with increasing total superlattice thickness over a temperature range from 30 to 150 kelvin, which is consistent with a coherent phonon heat conduction process. First-principles and Green's function–based simulations further support this coherent transport model. Accessing the coherent heat conduction regime opens a new venue for phonon engineering for an array of applications.

Additional Information

© 2013 American Association for the Advancement of Science. Received for publication 4 June 2012; Accepted for publication 9 October 2012. We thank A. A. Maznev, K. A. Nelson, K. C. Collins, and J. Johnson for helpful discussions. This material is based on work supported as part of the Solid State Solar-Thermal Energy Conversion Center (S3TEC), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under award DE-SC0001299/DE-FG02-09ER46577. M.N.L. was partially supported by the National Science Foundation Graduate Research Fellowship under grant 1122374.

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Additional details

Identifiers

Eprint ID
36176
Resolver ID
CaltechAUTHORS:20130104-134419873

Funding

NSF Graduate Research Fellowship
DGE-1122374
Department of Energy (DOE)
DE-SC0001299
Department of Energy (DOE)
DE-FG02-09ER46577

Dates

Created
2013-01-05
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Updated
2021-11-09
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