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arXiv · 1503.06247

Nuclear resonant scattering of synchrotron radiation by physisorbed Kr on TiO$_{2}$(110) surfaces in multilayer and monolayer regimes

Akihiko Ikeda·Taizo Kawauchi·Masuaki Matsumoto·Tatsuo Okano·Katsuyuki Fukutani·Xiao Wei Zhang·Yoshitaka Yoda
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Abstract

Physisorbed Kr layers on TiO$_{2}$(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 recoiless fraction $f$ evaluated 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.

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Akihiko Ikeda, Taizo Kawauchi, Masuaki Matsumoto, Tatsuo Okano, Katsuyuki Fukutani, Xiao Wei Zhang, Yoshitaka Yoda. 2015-04-07. Nuclear resonant scattering of synchrotron radiation by physisorbed Kr on TiO$_{2}$(110) surfaces in multilayer and monolayer regimes. https://doi.org/10.1103/physrevb.91.155402

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