Doping dependence of the phase diagram in one-dimensional extended Hubbard model: a functional renormalization group study

Using functional renormalization group method, we studied the phase diagram of the one-dimensional extended Hubbard model at different dopings. At half filling, variety of states strongly compete with each other. These states include spin-density wave, charge-density wave, s-wave and p -wave superco...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2019-03, Vol.31 (12), p.125601-125601
Main Authors: Xiang, Yuan-Yuan, Liu, Xiao-Jie, Yuan, Ying-Han, Cao, Jie, Tang, Chun-Mei
Format: Article
Language:English
Subjects:
bond order wave (BOW)
extended Hubbard model (EHM)
functional renormalization group (FRG)
phase diagram (PD)
wave superconductivity (PSC)
wave superconductivity (SSC)
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Summary:Using functional renormalization group method, we studied the phase diagram of the one-dimensional extended Hubbard model at different dopings. At half filling, variety of states strongly compete with each other. These states include spin-density wave, charge-density wave, s-wave and p -wave superconductivity, phase separation, and an exotic bond-order wave. By doping, system favours superconductivity more than density waves. At 1/8 doping, a new area of extended s-wave superconductivity emerges between charge density wave and bond-order wave regions. If the system is doped to 1/4-doping, a new area of p -wave superconductivity emerges between charge-density wave and spin-density wave regions.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/aafd4d