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Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites

Publication ,  Journal Article
Lara-Curzio, E; May, AF; Delaire, O; McGuire, MA; Lu, X; Liu, CY; Case, ED; Morelli, DT
Published in: Journal of Applied Physics
May 21, 2014

The heat capacity of natural (Cu12-x (Fe, Zn, Ag) x(Sb, As)4S13) and synthetic (Cu 12-xZnxSb4S13 with x = 0, 1, 2) tetrahedrite compounds was measured between 2 K and 380 K. It was found that the temperature dependence of the heat capacity can be described using a Debye term and three Einstein oscillators with characteristic temperatures that correspond to energies of ∼1.0 meV, ∼2.8 meV, and ∼8.4 meV. The existence of localized vibrational modes, which are assigned to the displacements of the trigonally coordinated Cu atoms in the structure, is discussed in the context of anharmonicity and its effect on the low lattice thermal conductivity exhibited by these compounds. © 2014 AIP Publishing LLC.

Duke Scholars

Published In

Journal of Applied Physics

DOI

EISSN

1089-7550

ISSN

0021-8979

Publication Date

May 21, 2014

Volume

115

Issue

19

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

Citation

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Lara-Curzio, E., May, A. F., Delaire, O., McGuire, M. A., Lu, X., Liu, C. Y., … Morelli, D. T. (2014). Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites. Journal of Applied Physics, 115(19). https://doi.org/10.1063/1.4878676
Lara-Curzio, E., A. F. May, O. Delaire, M. A. McGuire, X. Lu, C. Y. Liu, E. D. Case, and D. T. Morelli. “Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites.” Journal of Applied Physics 115, no. 19 (May 21, 2014). https://doi.org/10.1063/1.4878676.
Lara-Curzio E, May AF, Delaire O, McGuire MA, Lu X, Liu CY, et al. Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites. Journal of Applied Physics. 2014 May 21;115(19).
Lara-Curzio, E., et al. “Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites.” Journal of Applied Physics, vol. 115, no. 19, May 2014. Scopus, doi:10.1063/1.4878676.
Lara-Curzio E, May AF, Delaire O, McGuire MA, Lu X, Liu CY, Case ED, Morelli DT. Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites. Journal of Applied Physics. 2014 May 21;115(19).

Published In

Journal of Applied Physics

DOI

EISSN

1089-7550

ISSN

0021-8979

Publication Date

May 21, 2014

Volume

115

Issue

19

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences