Microscopic view of a two-dimensional lattice-gas Ising system within the grand canonical ensemble

被引：31

作者：

LaBella, VP ^{[1
]}

Bullock, DW ^{[1
]}

Anser, M ^{[1
]}

Ding, Z ^{[1
]}

Emery, C ^{[1
]}

Bellaiche, L ^{[1
]}

Thibado, PM ^{[1
]}

机构：

[1] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.84.4152

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A reversible 2D critical transition is observed on the GaAs(001) surface and modeled as a lattice-gas Ising system. Without depositing any material, 2D GaAs islands spontaneously form. The order parameter, four critical exponents, and coupling energies are measured from scanning tunneling microscope images of the microscopic domain structure and correlation functions as a function of temperature and pressure. Unprecedented insight into the domain structure of a 2D Ising system through the critical point and a complete Hamiltonian for modeling the GaAs(001) surface are presented.

引用

收藏

页码：4152 / 4155

页数：4

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