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

E. Lara-Curzio, A. F. May, O. Delaire, M. A. McGuire, X. Lu, Cheng Yun Liu, E. D. Case, D. T. Morelli

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Abstract

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.

LanguageEnglish (US)
Article number193515
JournalJournal of Applied Physics
Volume115
Issue number19
DOIs
StatePublished - May 21 2014

Profile

vibration mode
specific heat
thermal conductivity
oscillators
temperature dependence
atoms
temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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), [193515]. DOI: 10.1063/1.4878676

Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites. / Lara-Curzio, E.; May, A. F.; Delaire, O.; McGuire, M. A.; Lu, X.; Liu, Cheng Yun; Case, E. D.; Morelli, D. T.

In: Journal of Applied Physics, Vol. 115, No. 19, 193515, 21.05.2014.

Research output: Contribution to journalArticle

Lara-Curzio, E, May, AF, Delaire, O, McGuire, MA, Lu, X, Liu, CY, Case, ED & Morelli, DT 2014, 'Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites' Journal of Applied Physics, vol 115, no. 19, 193515. DOI: 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). 193515. Available from, DOI: 10.1063/1.4878676
Lara-Curzio, E. ; May, A. F. ; Delaire, O. ; McGuire, M. A. ; Lu, X. ; Liu, Cheng Yun ; Case, E. D. ; Morelli, D. T./ Low-temperature heat capacity and localized vibrational modes in natural and synthetic tetrahedrites. In: Journal of Applied Physics. 2014 ; Vol. 115, No. 19.
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