Central Peak in SrTi18O3 Studied by Light Scattering

Central Peak in SrTi18O3 Studied by Light Scattering
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光散射研究 SrTi18O3 的中心峰

DOI:
10.1080/00150190590926193
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
M. Itoh
M. Itoh
中科院分区:
--
文献类型:
--
作者:
Y. Tsujimi;H. Hasebe;Ruiping Wang;M. Itoh

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在SrTi(18 O 0.87 16 O 0.13)3(87% 18 O交换SrTiO 3)的VH光散射谱中发现了一个中心峰(CP)。CP的强度和弛豫时间都在Tm <$22 K附近(低于转变温度Tc <$25 K)出现宽峰。CP的物理起源被确定为不是偏振涨落,表示该CP不是有序-无序型相变的标志。极化的空间导数的随机涨落是CP的物理根源。
A central peak (CP) has been found mainly in the VH light scattering spectra of SrTi(18 O 0.87 16 O 0.13)3 (87% 18O-exchanged SrTiO3). Both of the intensity and relaxation time of the CP show broad peaks around T m ≈ 22 K (below the transition temperature T c ≈ 25 K). The physical origin of the CP is determined not to be the polarization fluctuation, representing that this CP is not a sign of a phase transition of order-disorder type. The stochastic fluctuation of the spatial derivatives of the polarization would be the physical origin of the CP.
低温下量子顺电 SrTi16O3 和 SrTi16O3 的极性顺序
DOI: --
发表时间: 2004
期刊: J.Phys.Soc.Jpn.(Letters) 73,No.5
影响因子: --
作者:
Y.Uesu;R.Nakai;C.Menoret;J-M.Kiat;M.Itoh;T.Kyomen
通讯作者: T.Kyomen