Two-dimensional superfluidity in 4He clusters intercalated into graphite

被引：2

作者：

Ahn, Jeonghwan ^{[1
]}

Volkoff, Tyler ^{[1
,2
]}

Kim, Jae-Sung ^{[3
,4
]}

Kwon, Yongkyung ^{[1
]}

机构：

[1] Konkuk Univ, Dept Phys, Seoul 05029, South Korea

[2] Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA

[3] Sook Myung Womens Univ, Dept Phys, Seoul 04310, South Korea

[4] Sook Myung Womens Univ, Inst Adv Mat & Syst, Seoul 04310, South Korea

来源：

PHYSICAL REVIEW B | 2020年 / 102卷 / 14期

基金：

新加坡国家研究基金会;

关键词：

MONTE-CARLO; TRANSITION; SURFACE; SIMULATION; FILM;

D O I：

10.1103/PhysRevB.102.144527

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Motivated by recent technical developments on selective intercalation of inert gases just beneath the surface graphene of graphite, we perform path-integral Monte Carlo calculations to study structural and superfluid properties of He-4 clusters encapsulated between a bulged surface graphene layer and the graphite (0001) substrate. The intercalated He-4 atoms initially decorate the inner surface of the bulged graphene to form a shell structure, leaving a void inside it. Then, the additional He-4 atoms form a disk-shaped liquid platelet in the void, which shows finite superfluid response at temperatures below 1 K. The temperature-dependent superfluid fractions of the platelet follow modified Kosterlitz-Thouless recursion relations, indicating that two-dimensional superfluidity can be realized in an intercalated He-4 system.

引用

页数：5

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