Structural Study of Adsorbed Helium Films: New Approach with Synchrotron Radiation X-rays

被引：2

作者：

Yamaguchi, Akira ^{[1
]}

Tajiri, Hiroo ^{[2
]}

Kumashita, Atsuki ^{[1
]}

Usami, Jun ^{[2
,3
]}

Yamane, Yu ^{[1
]}

Sumiyama, Akihiko ^{[1
]}

Suzuki, Masaru ^{[4
]}

Minoguchi, Tomoki ^{[5
]}

Sakurai, Yoshiharu ^{[2
]}

Fukuyama, Hiroshi ^{[3
]}

机构：

[1] Univ Hyogo, Grad Sch Sci, 3-2-1 Kouto, Ako, Hyogo 6781297, Japan

[2] Japan Synchrotron Radiat Res Inst, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan

[3] Univ Tokyo, Cryogen Res Ctr, Bunkyo Ku, 2-11-16 Yayoi, Tokyo 1130032, Japan

[4] Univ Electrocommun, Dept Engn Sci, Chofu, Tokyo 1828585, Japan

[5] Univ Tokyo, Inst Phys, Meguro Ku, 3-8-1 Komaba, Tokyo 1538902, Japan

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2022年 / 208卷 / 5-6期

关键词：

Two-dimensional helium film; Crystal truncation rod scattering; Surface X-ray diffraction; Graphite substrate; HEAT-CAPACITY; NEUTRON-DIFFRACTION; SCATTERING; GRAPHITE; SURFACE;

D O I：

10.1007/s10909-021-02652-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A few atomic layers of helium adsorbed on graphite have been attracting much attention as one of the ideal quantum systems in two dimension. Although previous reports on neutron diffraction have shown fundamental structural information in these systems, there still remain many open questions. Here, we propose surface crystal truncation rod (CTR) scatterings using synchrotron radiation X-rays as a promising method to reveal surface and interface structures of helium films on graphite at temperatures below 2 K, based on the preliminary experimental results on a monolayer of He-4 on a thin graphite. Our estimation on heat generation by X-ray irradiations also suggests that CTR scatterings are applicable to even at system temperatures near 100 mK.

引用

页码：441 / 448

页数：8

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