Studies of Two Dimensional Quantum Fluids and Solids with Low Temperature LEED and STM

利用低温 LEED 和 STM 研究二维量子流体和固体

• 批准号: 22244042
• 负责人: FUKUYAMA Hiroshi
• 金额: $ 30.04万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010-04-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22244042/
• 关键词: 単原子層; 量子液体・固体; 超低温物理; STM; LEED; グラファイト; 量子流体・固体; 低温物性; 表面構造解析; 走査トンネル分光; 単原子膜; グラフェン

Low temperature quantum phase diagrams of the first and second layers of helium-3 (3He) and helium-4 (4He) adsorbed on graphite were studied by specific heat measurements. Theoretically unexpected many-body condensation of two-dimensional 3He was discovered. In addition, the existence of a commensurate solid phase in the second layer of both 3He and 4He was confirmed, which had also been unexpected from the first-principles calculations. This phase is presumably a low-density quantum solid with zero-point defectons.We succeeded in the first real-space imaging of monolayer of Krypton adsorbed on graphite with low temperature STM and confirmed the adsorption site of Kr to be the hollow site of graphite honeycomb lattice. A feasibility study of development of a LEED instrument which works at dilution refrigerator temperatures was successfully finished.

用比热法研究了氦-3(3He)和氦-4(4He)在石墨表面吸附的第一层和第二层低温量子相图。发现了理论上意想不到的二维3He多体凝聚。此外，还证实了在3He和4He的第二层中都存在相称的固相，这也是第一原理计算所没有预料到的。利用低温扫描隧道显微镜首次成功地对氪吸附在石墨表面的单分子膜进行了实空间成像，证实了Kr的吸附位置为石墨蜂窝晶格的中空位。成功地完成了研制工作在稀释冰箱温度下的LEED仪器的可行性研究。

项目成果

Hysterisis of non-Classical rotational inertia in 2D 4He

2D 4He 中非经典转动惯量的迟滞

• 发表时间: 2011
• 作者: 川崎雅裕;北嶋直弥;中山和則;久保園芳博;Y. Shibayama
• 通讯作者: Y. Shibayama

STS Observation of Dirac Fermion, Topologically appeared on Graphite

狄拉克费米子的 STS 观测，拓扑出现在石墨上

• 发表时间: 2010
• 作者: T. Matsui;K. Tagami;M. Tsukada;and H. Fukuyama
• 通讯作者: and H. Fukuyama

Density Variation of the Frustrated Ferromagnetism in 2D Solid H^^3e

二维固体 H^^3e 中受抑铁磁性的密度变化

• DOI: 10.1007/s10909-009-9993-9
• 发表时间: 2010
• 期刊: J. Low Temp. Phys.
• 作者: D. Sato;S. Takayoshi;K. Obata;T. Matsui;and H. Fukuyama
• 通讯作者: and H. Fukuyama

2次元ヘリウム3における自己凝縮液体の研究IV

二维氦中自凝液体的研究 3 IV

• 发表时间: 2012
• 作者: 成瀬公暁;佐藤大輔;松井朋裕;福山寛
• 通讯作者: 福山寛

Self-Condensed State and Spin Fluctuations in Two-Dimensional ^3He System

二维^3He系统中的自凝聚态和自旋涨落

• 发表时间: 2011
• 作者: K.Naruse;D.Sato;T.Matsui;H.Fukuyama
• 通讯作者: H.Fukuyama