Article Dans Une Revue Journal of Non-Crystalline Solids Année : 1994

Phason-strain field and vibrational specific heat in icosahedral AlLiCu

K. Wang
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C. Degand
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P. Donnadieu
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Résumé

For an icosahedral system, phason-strain fields can be classified into two classes, transforming respectively under the Γ4 and Γ5 irreducible representations of the icosahedral group. Group theory predicts that the Γ4 phason-strain field, as the one observed in as-cast quasicrystalline AlLiCu samples, is not coupled to phonon modes. The low temperature specific heat of AlLiCu samples was measured after 10 days of annealing which allows phason-strain elimination and leads to almost perfect samples. No vibrational contribution evolution is observed. Some consequences and implications are discussed.

Dates et versions

hal-04944786 , version 1 (13-02-2025)

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Citer

K. Wang, C. Degand, P. Donnadieu, P. Garoche. Phason-strain field and vibrational specific heat in icosahedral AlLiCu. Journal of Non-Crystalline Solids, 1994, 170 (1), pp.51-56. ⟨10.1016/0022-3093(94)90102-3⟩. ⟨hal-04944786⟩
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