Phase diagram of interacting fermionic two-leg ladder with pair hopping

被引：0

作者：

刘万里 ^{[1
,2
]}

原天忠 ^{[1
]}

林志 ^{[1
,2
]}

闫伟 ^{[1
]}

机构：

[1] Department of Physics, State Key Laboratory of Surface Physics and Laboratory of Advanced Materials, Fudan University

[2] School of Physics and Materials Science, Anhui University

来源：

Chinese Physics B | 2019年 / 02期

关键词：

two-leg ladder; pair hopping; bosonization; Majorana fermion;

D O I：

暂无

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study the phase diagram of the interacting fermionic two-leg ladder, which is featured by pair hopping and interactions of singlet and triplet superconducting channels. By using Abelian bosonization method, we obtain the full phase diagram of our model. The superconducting triplet pairing phase is characterized by a fractional edge spin and interpreted as two Kitaev chains under the mean filed approximation. The pair hopping will give rise to spin-density-wave(SDW)orders and can also support Majorana edge modes in spin channel. At half filling, the resulting Majorana-SDW phase shows additional fractionalization in charge channel, and can be interpreted as two Su–Schrieffer–Heeger(SSH) chains in the mean field regime.

引用

页码：123 / 128

页数：6