Simulations of Surface X-ray Diffraction from a Monolayer 4He Film Adsorbed on Graphite

Atsuki Kumashita; Hiroo Tajiri; Akira Yamaguchi; Jun Usami; Akihiko Sumiyama; Yu Yamane; Masaru Suzuki; Tomoki Minoguchi; Yoshiharu Sakurai; Hiroshi Fukuyama

doi:10.7566/jpscp.38.011004

arXiv · 2210.04411

Simulations of Surface X-ray Diffraction from a Monolayer 4He Film Adsorbed on Graphite

Atsuki Kumashita·Hiroo Tajiri·Akira Yamaguchi·Jun Usami·Akihiko Sumiyama·Yu Yamane·Masaru Suzuki·Tomoki Minoguchi·Yoshiharu Sakurai·Hiroshi Fukuyama

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Abstract

We carried out simulations of crystal truncation rod (CTR) scatterings, i.e., one of the surface X-ray diffraction techniques with atomic resolution, from a monolayer He film adsorbed on graphite. Our simulations reveal that the 00L rod scatterings from the He monolayer exhibit notable intensity modifications for those from a graphite surface in the ranges of approximately L = 0.6 - 1.7 and L = 2.2 - 3.5. The height of the He monolayer from the graphite surface largely affects the CTR scattering profiles, indicating that CTR scatterings have enough sensitivities to determine the surface structure of the various phases in the He layer. In particular, in the incommensurate solid phase, our preliminary experimental data show the intensity modulations that are expected from the present simulations.

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Atsuki Kumashita, Hiroo Tajiri, Akira Yamaguchi, Jun Usami, Akihiko Sumiyama, Yu Yamane, Masaru Suzuki, Tomoki Minoguchi, Yoshiharu Sakurai, Hiroshi Fukuyama. 2022-10-10. Simulations of Surface X-ray Diffraction from a Monolayer 4He Film Adsorbed on Graphite. https://doi.org/10.7566/jpscp.38.011004

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