Nuclear resonant scattering of synchrotron radiation by physisorbed Kr on TiO2(110) surfaces in multilayer and mono- layer regimes
Nuclear resonant scattering of synchrotron radiation by physisorbed Kr on TiO2(110) surfaces in multilayer and mono- layer regimes
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多层和单层 TiO2(110) 表面上物理吸附 Kr 引起的同步加速器辐射的核共振散射
DOI：
10.1103/physrevb.91.155402
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发表时间：
2015
影响因子：
3.7
通讯作者：
and Y. Yoda
中科院分区：
文献类型：
--
作者：
A. Ikeda;T. Kawauchi;M. Matsumoto;T. Okano;K. Fukutani;X.W. Zhang;and Y. Yoda
通过同步加速器辐射的核共振散射（NRS）研究了（110）表面上的物理吸附Kr层，Kr厚度范围从多层到单层。 NRS 强度作为 Kr 暴露的函数进行测量，由此估计对应于单层的 NRS 信号为 0.23 cps。在不同厚度下测量的时间谱显示出单调衰减，没有任何量子拍频特征。通过时间谱分析评估的无反冲分数显示，温度从 19 K 升至 25 K 时，无反冲分数显着降低。作为其起源，提出了单层 Kr 的有序-无序相变。
Physisorbed Kr layers on(110) surfaces were investigated by means of nuclear resonant scattering (NRS) of synchrotron radiation at Kr thicknesses ranging from multilayer to monolayer. The NRS intensity was measured as a function of the Kr exposure, from which the NRS signal corresponding to monolayer was estimated as 0.23 cps. The time spectra measured at various thicknesses showed a monotonous decay without any quantum beat features. The recoilless fractionevaluated from the analysis of the time spectrum revealed a substantial reduction upon temperature rise from 19 to 25 K. As its origin, an order-disorder phase transition of the monolayer Kr is proposed.