Cited by 471Thermal properties of materialsSemiconductor materials and interfacesSemiconductor Quantum Structures and Devices

Thermal-conductivity measurements of GaAs/AlAs superlattices using a picosecond optical pump-and-probe technique

Capinski, W. S., Maris, H. J., Ruf, T., Cardona, M., Ploog, K., Katzer, D. S.·1999·Physical Review B

Abstract

We present measurements of the lattice thermal conductivity ${\ensuremath{\kappa}}_{\ensuremath{\perp}}$ normal to the interfaces of $(\mathrm{GaAs}{)}_{n}/(\mathrm{AlAs}{)}_{n}$ superlattices with n between 1 and 40 monolayers. The conductivity was measured by an optical pump-and-probe technique in the temperature range of 100 to 375 K. In the experiment, an Al film is deposited onto a superlattice sample, and the rate at which this film cools by conduction into the superlattice is determined. We find a general decrease in ${\ensuremath{\kappa}}_{\ensuremath{\perp}}$ with a reduction of the superlattice period. At 300 K, ${\ensuremath{\kappa}}_{\ensuremath{\perp}}$ of the $(\mathrm{GaAs}{)}_{40}/(\mathrm{AlAs}{)}_{40}$ superlattice is approximately three times less than $\ensuremath{\kappa}$ of bulk GaAs, and ${\ensuremath{\kappa}}_{\ensuremath{\perp}}$ of the $(\mathrm{GaAs}{)}_{1}/(\mathrm{AlAs}{)}_{1}$ superlattice is an order of magnitude less than $\ensuremath{\kappa}$ of bulk GaAs. We discuss the decrease in ${\ensuremath{\kappa}}_{\ensuremath{\perp}}$ compared to the bulk constituents in terms of extrinsic and intrinsic scattering mechanisms.

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Crossref · 10.1103/physrevb.59.8105

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Authors
Capinski, W. S., Maris, H. J., Ruf, T., Cardona, M., Ploog, K., & Katzer, D. S.
Affiliations
  • Brown University (US)
  • United States Naval Research Laboratory (US)
Venue
Physical Review B
Published
1999-03-15
Volume
59
Issue
12
Pages
8105-8113
ISSN
  • 0163-1829 (ISSN-L)
  • 1095-3795
OpenAlex
W2077023943
Cited by
471
References
39
Citations by year
2026: 11 · 2025: 12 · 2024: 9 · 2023: 9 · 2022: 15 · 2021: 22 · 2020: 24 · 2019: 15 · 2018: 28 · 2017: 26 · 2016: 21 · 2015: 23 · 2014: 23 · 2013: 21 · 2012: 25
FWCI
11.72
Type
journal article
Language
en
Open access
closed
Locations
  • Physical review. B, Condensed matter (publishedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
Funders
  • U.S. Department of Energy
  • Brown University
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Semiconductor materials and interfaces
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Semiconductor Quantum Structures and Devices
Keywords
lattice thermal conductivity, GaAs/AlAs superlattices, phonon scattering, superlattice period, interfacial thermal resistance

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