Irrational versus rational charge and statistics in two-dimensional quantum systems

被引：60

作者：

Chamon, Claudio ^{[1
,2
]}

Hou, Chang-Yu ^{[1
]}

Jackiw, Roman ^{[2
]}

Mudry, Christopher ^{[3
]}

Pi, So-Young ^{[1
]}

Schnyder, Andreas P. ^{[4
]}

机构：

[1] Boston Univ, Dept Phys, Boston, MA 02215 USA

[2] MIT, Dept Phys, Cambridge, MA 02139 USA

[3] Paul Scherrer Inst, Condensed Matter Theory Grp, CH-5232 Villigen, Switzerland

[4] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.110405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that quasiparticle excitations with irrational charge and irrational exchange statistics exist in tight-binding systems described, in the continuum approximation, by the Dirac equation in (2+1)-dimensional space and time. These excitations can be deconfined at zero temperature, but when they are, the charge rerationalizes to the value 1/2 and the exchange statistics to that of "quartons" (half-semions).

引用

页数：4

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