通过光学二次谐波产生观测SrTiO₃中的近表面结构相变。
Observation of a near-surface structural phase transition in SrTiO3 by optical second harmonic generation.
作者信息
Mishina ED, Misuryaev TV, Sherstyuk NE, Lemanov VV, Morozov AI, Sigov AS, Rasing T
机构信息
Moscow Institute of Radioengineering, Electronics and Automation, Moscow 117454, Russia.
出版信息
Phys Rev Lett. 2000 Oct 23;85(17):3664-7. doi: 10.1103/PhysRevLett.85.3664.
PMID:11030976
Abstract
A near-surface structural phase transition on a SrTiO3 single crystal, occurring at T() about 45 K above the bulk cubic-to-tetragonal transition, is observed by means of optical second harmonic generation. The temperature dependence of the second harmonic field in the vicinity of T() is described with a phenomenological Landau-type model.
摘要
通过光学二次谐波产生法观察到，在SrTiO₃单晶上发生了一种近表面结构相变，该相变发生在比体相立方-四方相变温度高约45K的T()温度处。用一个唯象的朗道型模型描述了T()附近二次谐波场的温度依赖性。
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