OBSERVATION OF A DOUBLET IN THE QUASI-ELASTIC CENTRAL PEAK OF QUANTUM-PARAELECTRIC SRTIO3
OBSERVATION OF A DOUBLET IN THE QUASI-ELASTIC CENTRAL PEAK OF QUANTUM-PARAELECTRIC SRTIO3
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DOI：
10.1103/physrevlett.75.2416
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发表时间：
1995-09-18
影响因子：
8.6
通讯作者：
VACHER, R
中科院分区：
文献类型：
--
作者：
HEHLEN, B;PEROU, AL;VACHER, R
对取向的四方相钛酸锶样品进行的瑞利-布里渊光散射谱表明，在低温下出现了新的二重态。除了Lyons和Fleury已经报道的宽广的中心峰之外，这种散射也出现在KTaO_3中。这种光谱成分的可能来源是第二种声音，即熵的波状传播。
Rayleigh-Brillouin light-scattering spectroscopy performed on oriented samples of tetragonal SrTiO3 reveals the presence of a new doublet at low temperatures. This scattering, also seen in KTaO3, appears in addition to the broad central peak already reported by Lyons and Fleury. The likely origin of this spectral component is second sound, the wavelike propagation of entropy.