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Power Law Decay and Phase Rigidity for large-amplitude Coherent Phonons in Bismuth at Helium Temperature: Possible Evidence for Transient Supersolid State
並列摘要
Intense ultrafast laser excitation can produce transient states of condensed matter that would otherwise be inaccessible. At high excitation level, the interatomic forces can be altered, resulting in an unusual lattice dynamics. Here we report the study of coherent lattice dynamics in Bi made for various excitation levels at helium temperature. We demonstrate that under certain conditions, the fully symmetric phonons of large amplitude exhibit anomalous decay and phase rigidity, both of which possibly signaling the attainment of transient supersolid state.
並列關鍵字
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