Sublattice ordering in a dilute ensemble of monovalent adatoms on graphene

被引：34

作者：

Cheianov, V. V. ^{[1
]}

Syljuasen, O. ^{[2
]}

Altshuler, B. L. ^{[3
]}

Fal'ko, V. I. ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[2] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

[3] Columbia Univ, Dept Phys, New York, NY 10027 USA

来源：

EPL | 2010年 / 89卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

RANGE OSCILLATORY INTERACTION; SURFACE; ATOMS;

D O I：

10.1209/0295-5075/89/56003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

When adsorbents attach themselves to carbons in the honeycomb lattice of graphene, they may preferentially take positions on one of its two sublattices, thus breaking the global lattice symmetry. This leads to opening a gap in the electronic spectrum. We show that such a sublattice ordering may spontaneously occur in a low-density ensemble of adatoms adsorbed on graphene, due to the long-range interaction between them mediated by electrons. As a result sublattice-ordered domains may form, with electronic properties characteristic of a two-dimensional topological insulator. Copyright (C) EPLA, 2010

引用

页数：4

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