STM observations of helium atoms adsorbed on graphite surfaces

被引：6

作者：

Mori, N ^{[1
]}

Bauerle, C ^{[1
]}

Kumakura, T ^{[1
]}

Morishita, M ^{[1
]}

Fukuyama, H ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Phys, Ibaraki, Osaka 305, Japan

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 1998年 / 110卷 / 1-2期

关键词：

D O I：

10.1023/A:1022543824422

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present preliminary results of real-space imaging of two-dimensional (2D) submonolayer He-4 films adsorbed on graphite basal planes using a cryogenic STM. Below 1 K, we observed an additional root 3 x root 3 atomic corrugation superimposed to the triangular lattice of the B-site carbon atoms of the graphite surface. This superlattice has the same periodicity as the commensurate solid He-4. It disappears on warming from 1 to 2 K presumably due to melting of the 2D solid. Furthermore, an energy gap of the order of +/- (10 to 30) mV was observed in tunneling spectroscopy measurements associated with the adsorption of He-4.

引用

页码：641 / 646

页数：6

共 10 条

[1] PHASES OF HE-3 AND HE-4 MONOLAYER FILMS ADSORBED ON BASAL-PLANE ORIENTED GRAPHITE [J].