中国物理学会期刊网
Chin.Phys.B  2019, Vol.28 Issue (2): 020303  DOI:10.1088/1674-1056/28/2/020303
Phase diagram of interacting fermionic two-leg ladder with pair hopping
1 Department of Physics, State Key Laboratory of Surface Physics and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China;2 School of Physics and Materials Science, Anhui University, Hefei 230601, China>

Abstract

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.
收稿日期:2018-10-16

基金资助

Project supported by the Open Project of the State Key Laboratory of Surface Physics in Fudan University, China (Grant No. KF2018_13) and the Ph. D. Research Startup Foundation of Anhui University (Grant No. J01003310).

引用本文

[英文]
Wan-Li Liu, Tian-Zhong Yuan, Zhi Lin, Wei Yan. Phase diagram of interacting fermionic two-leg ladder with pair hopping[J]. Chin. Phys. B, 2019, 28(2): 020303.
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