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

    Research output: Contribution to journalArticle

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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.

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

    Profile

    specific heat
    vibration mode
    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, Vol. 115, No. 19, 193515, 21.05.2014.

    Research output: Contribution to journalArticle

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    AU - Delaire,O.

    AU - McGuire,M. A.

    AU - Lu,X.

    AU - Liu,Cheng Yun

    AU - Case,E. D.

    AU - Morelli,D. T.

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