Ultrafast Critical Dynamics of Ferroelectric Phase Transition in Pb$_{1-x}$Ge$_{x}$Te

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dc.creatorLu, Rong
dc.creatorHase, Muneaki
dc.creatorKitajima, Masahiro
dc.creatorNakashima, Shinichi
dc.creatorSugai, Shunji
dc.date2006-12-14
dc.date2006-12-19
dc.date.accessioned2026-07-07T07:42:57Z
dc.date.available2026-07-07T07:42:57Z
dc.descriptionTransient responses of the electronic excitation and coherent soft phonon are investigated both above and below the ferroelectric phase transition temperature T$_{c}$ in Pb$_{1-x}$Ge$_{x}$Te by using an optical pump-probe technique. The coherent soft mode shows large red-shift and heavily over-damped decay as the temperature approaching T$_{c}$ from the low temperature side and the soft mode disappears above T$_{c}$. The transient electronic response exhibits an abrupt change across T$_{c}$. The critical behaviors of both the phononic and electronic dynamics are interpreted by the ferroelectric phase transition.
dc.description4 pages, 4 figures, corrected typos, accepted for publication in Physical Review B
dc.identifierhttps://arxiv.org/abs/cond-mat/0612347
dc.identifierhttp://arxiv.org/abs/cond-mat/0612347
dc.identifierPhysical Review B 75, 012107 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.012107
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122641
dc.subjectMaterials Science
dc.titleUltrafast Critical Dynamics of Ferroelectric Phase Transition in Pb$_{1-x}$Ge$_{x}$Te
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