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Ferromagnetism and Superconductivity in the One-dimensional Multi-orbital Hubbard Model
Ferromagnetism and Superconductivity in the One-dimensional Multi-orbital Hubbard Model
Sano, Kazuhiro
6702
Ono, Yoshiaki
62
multi-orbital Hubbard model
numerical diagonalization
Hund's rule coupling
superconductivity
erromagnetism
Using the numerical diagonalization method, we investigate the ferromagnetism and the superconductivity in the multi-orbital Hubbard model in one-dimension. To examine the superconductivity, we calculate the critical exponent Kp based on the Luttinger liquid theory and the anomalous flux quantization in the superconducting region. Analyzing the value of Kp, we obtain the phase diagram on the U' − J parameter plane including the superconducting phase and the fully polarized ferromagnetic phase.
journal article
Elsevier
2007-03
application/pdf
Journal of Magnetism and Magnetic Materials
2
310
e319
e321
Journal of Magnetism and Magnetic Materials
AA00701394
03048853
https://niigata-u.repo.nii.ac.jp/record/2031/files/1004.pdf
eng
info:doi/10.1016/j.jmmm.2006.10.267