Interplay between nematic fluctuation and superconductivity in a two-orbital Hubbard model: a quantum Monte Carlo study
| Autor: | Guangkun Liu, Zhongbing Huang, Hai-Qing Lin, Shi-Chao Fang, Xiaojun Zheng |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Superconductivity
Quantum monte carlo method Physics Electron pair Hubbard model Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Quantum Monte Carlo Condensed Matter - Superconductivity FOS: Physical sciences Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Condensed Matter::Soft Condensed Matter Superconductivity (cond-mat.supr-con) Condensed Matter - Strongly Correlated Electrons Liquid crystal Pairing Condensed Matter::Superconductivity 0103 physical sciences Antiferromagnetism General Materials Science 010306 general physics |
| Zdroj: | Journal of physics. Condensed matter : an Institute of Physics journal. 30(44) |
| ISSN: | 1361-648X |
| Popis: | To understand the interplay between nematic fluctuation and superconductivity in iron-based superconductors, we performed a systematic study of the realistic two-orbital Hubbard model by using the constrained-path quantum Monte Carlo method. Our numerical results showed that the on-site nematic interaction induces a strong enhancement of nematic fluctuations at various momentums, especially at ($\pi$,$\pi$). Simultaneously, it was found that the on-site nematic interaction suppresses the ($\pi$,0)/(0,$\pi$) antiferromagnetic order and long-range electron pairing correlations for dominant pairing channels in iron-based superconductors. Our findings suggest that nematic fluctuation seems to compete with superconductivity in iron-based superconductors. Comment: 6 figures |
| Databáze: | OpenAIRE |
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