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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27625


    Title: Ab initio elasticity and lattice dynamics of AgGaSe2
    Authors: Karki, B. B.;Clark, S. J.;Warren, M. C.;薛宏中;Hsueh, Hung-Chung;Ackland, G. J.;Crain, Jason
    Contributors: 淡江大學物理學系
    Date: 1997-01-13
    Issue Date: 2009-12-31 10:30:47 (UTC+8)
    Publisher: Institute of Physics
    Abstract: The structural, elastic and vibrational properties of the ternary semiconductor AgGaSe2 chalcopyrite are studied using the pseudopotential method within the local density approximation. The lattice constants and internal parameter are in good agreement with experiments. The elastic moduli derived from the stresses generated by small strains compare favourably with experiments and the material is elastically anisotropic. All zone-centre phonons are determined by diagonalization of the dynamical matrix derived from the forces generated by small ionic displacements. The calculated phonon frequencies are in excellent agreement with experiment and can be grouped into three bands. Two silent 02 modes are also obtained. The eigenvectors are used to discuss the three-band phonon spectrum and the spectroscopic activity of the modes.
    Relation: Journal of Physics: Condensed Matter 9(2), pp.375-380
    DOI: 10.1088/0953-8984/9/2/005
    Appears in Collections:[物理學系暨研究所] 期刊論文

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