29th International Symposium on Superconductivity | |
Interplay between staggered flux and d-wave superconducting states in Hubbard model | |
Kobayashi, Kenji^1 ; Yokoyama, Hisatoshi^2 | |
Department of Natural Science, Chiba Institute of Technology, Shibazono, Narashino | |
275-0023, Japan^1 | |
Department of Physics, Tohoku University, Aoba-ku, Sendai | |
980-8578, Japan^2 | |
关键词: Pseudogap state; Renormalization; Staggered flux state; Superconducting state; Variational Monte Carlo method; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012031/pdf DOI : 10.1088/1742-6596/871/1/012031 |
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来源: IOP | |
【 摘 要 】
With cuprate superconductors in mind, we check whether the d-wave superconducting (dSC) state coexists with or excludes the staggered flux (SF) state, which was revealed to be the strong candidate for the pseudogap state. To this end, we use a variational Monte Carlo method for the square Hubbard model with diagonal transfer t′. In the trial wave function, dSC and SF orders coexist, which allows a continuous description of their interplay; essential factors for Mott physics and band renormalization are also included. It is found that the SF state does not coexist with dSC and is unstable for U/t = 12 regardless of the value of t′/t within the present work.
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