Fractional charge excitations in fermionic ladders

被引：31
|
作者：
Narozhny, BN
Carr, ST
Nersesyan, AA
机构：
[1] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy
[2] Andronikashvili Inst Phys, GE-0177 Tbilisi, Georgia
来源：
PHYSICAL REVIEW B | 2005年 / 71卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.71.161101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The system of interacting spinless fermions hopping on a two-leg ladder in the presence of an external magnetic field is shown to possess a long-range order: the bond density wave or the staggered flux phase. In both cases the elementary excitations are Z(2) kinks and carry one half the charge of an electron.
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