Electric-Dipole-Induced Universality for Dirac Fermions in Graphene

被引：26

作者：

De Martino, Alessandro ^{[1
]}

Kloepfer, Denis ^{[2
]}

Matrasulov, Davron ^{[3
]}

Egger, Reinhold ^{[2
]}

机构：

[1] City Univ London, Dept Math, London EC1V 0HB, England

[2] Univ Dusseldorf, Inst Theoret Phys, D-40225 Dusseldorf, Germany

[3] Univ Tashkent, Turin Polytechn, Tashkent 100095, Uzbekistan

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 18期

关键词：

SYSTEM;

D O I：

10.1103/PhysRevLett.112.186603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study electric dipole effects for massive Dirac fermions in graphene and related materials. The dipole potential accommodates towers of infinitely many bound states exhibiting a universal Efimov-like scaling hierarchy. The dipole moment determines the number of towers, but there is always at least one tower. The corresponding eigenstates show a characteristic angular asymmetry, observable in tunnel spectroscopy. However, charge transport properties inferred from scattering states are highly isotropic.

引用

页数：5

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