Competition between superconductivity and spin density wave
arXiv:1101.0381 · doi:10.1007/s10948-012-1744-5
Abstract
The Hubbard model has been investigated widely by many authors, while this work may be new in two aspects. One, we focus on the possible effects of the positions of the gaps associated with the pairing and the spin density wave. Two, we suggest that the models with different parameters are appropriate for different materials (or a material in different doped regions). This will lead to some new insights into the high temperature superconductors. It is shown that the SDW can appear at some temperature region when the on-site Coulomb interaction is larger, while the SC requires a decreased U at a lower temperature. This can qualitatively explain the relationship between superconducting and pseudogap states of Cu-based superconductors in underdoped and optimally doped regions. The superinsulator is also discussed.
11 pages, has been published in J Supercond Nov Magn
References in corpus (6)
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- From a single-band metal to a high-temperature superconductor via two thermal phase transitions (Supporting Material)
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