Superfluid and Supersolid Phases of 4He on the Second Layer of Graphite

被引：14

作者：

Gordillo, M. C. ^{[1
]}

Boronat, J. ^{[2
]}

机构：

[1] Univ Pablo de Olavide, Dept Sistemas Fis Quim & Nat, E-41013 Seville, Spain

[2] Univ Politecn Cataluna, Dept Fis, Campus Nord B4-B5, E-08034 Barcelona, Spain

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 20期

关键词：

HEAT-CAPACITY; TRANSITION;

D O I：

10.1103/PhysRevLett.124.205301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We revisited the phase diagram of the second layer of He-4 on top of graphite using quantum Monte Carlo methods. Our aim was to explore the existence of the novel phases suggested recently in experimental works, and determine their properties and stability limits. We found evidence of a superfluid quantum phase with hexatic correlations, induced by the corrugation of the first Helium layer, and a quasi-two-dimensional supersolid corresponding to a 7/12 registered phase. The 4/7 commensurate solid was found to be unstable, while the triangular incommensurate crystals, stable at large densities, were normal.

引用

页数：5

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