Spinful fermionic ladders at incommensurate filling: Phase diagram, local perturbations, and ionic potentials

被引：19

作者：

Carr, Sam T. ^{[1
,2
,3
]}

Narozhny, Boris N. ^{[2
,3
]}

Nersesyan, Alexander A. ^{[4
]}

机构：

[1] Univ Kent, Sch Phys Sci, Canterbury CT2 7NH, Kent, England

[2] Karlsruher Inst Technol, Inst Theorie Kondensierten Mat, D-76128 Karlsruhe, Germany

[3] Karlsruher Inst Technol, DFG Ctr Funct Nanostruct, D-76128 Karlsruhe, Germany

[4] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy

来源：

ANNALS OF PHYSICS | 2013年 / 339卷

关键词：

Luttinger liquid; Spin gap; Ladder materials; Charge transport; DIMENSIONAL ELECTRON-GAS; LIQUID BEHAVIOR; LUTTINGER LIQUIDS; CARBON NANOTUBES; FIELD-THEORY; TRANSPORT; MODEL; TRANSITIONS; CROSSOVER; CHAINS;

D O I：

10.1016/j.aop.2013.08.007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the effect of external potential on transport properties of the fermionic two-leg ladder model. The response of the system to a local perturbation is strongly dependent on the ground state properties of the system and especially on the dominant correlations. We categorize all phases and transitions in the model (for incommensurate filling) and introduce "hopping-driven transitions" that the system undergoes as the inter-chain hopping is increased from zero. We also describe the response of the system to an ionic potential. The physics of this effect is similar to that of the single impurity, except that the ionic potential can affect the bulk properties of the system and in particular induce true long range order. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：22 / 80

页数：59

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