Influence of the electron phase transition on the lattice dynamics of YbInCu4

Influence of the electron phase transition on the lattice dynamics of YbInCu4

Measurements of the acoustic phonon branches along the [110] direction of YbInCu4 at temperatures from 10 to 295K have been performed in order to study the effects of the transition to an intermediate-valence state on the lattice dynamics. At all measured wave vectors, the phonon energies are higher...

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Veröffentlicht in:Physica. B, Condensed matter Condensed matter, 2004-07, Vol.350 (1-3), p.E139-E141, Article E139
Hauptverfasser: Lazukov, V.N, Ivanov, A.S, Ritter, F, Alekseev, P.A, Assmus, W, Sadikov, I.P, Tiden, N.N
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container_issue 1-3
container_start_page E139
container_title Physica. B, Condensed matter
container_volume 350
creator Lazukov, V.N
Ivanov, A.S
Ritter, F
Alekseev, P.A
Assmus, W
Sadikov, I.P
Tiden, N.N
description Measurements of the acoustic phonon branches along the [110] direction of YbInCu4 at temperatures from 10 to 295K have been performed in order to study the effects of the transition to an intermediate-valence state on the lattice dynamics. At all measured wave vectors, the phonon energies are higher below the transition temperature (Tc=40K) than at room temperature. The strongest effects (40%) are observed near the zone boundary. The unit-cell volume increases below the transition. Hence, the observed hardening of the acoustic vibrations should undoubtedly be related to the electronic transition into the intermediate valence state.
doi_str_mv 10.1016/j.physb.2004.03.037
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title Influence of the electron phase transition on the lattice dynamics of YbInCu4
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