Competition among various charge-inhomogeneous states and d -wave superconducting state in Hubbard models on square lattices

Kota Ido, Takahiro Ohgoe, Masatoshi Imada

研究成果: Article査読

27 被引用数 (Scopus)

抄録

We study competitions among charge-uniform and -inhomogeneous states in two-dimensional Hubbard models by using a variational Monte Carlo method. At realistic parameters for cuprate superconductors, emergent effective attraction of carriers generated from repulsive Coulomb interaction leads to charge/spin stripe ground states, which severely compete with uniform superconducting excited states in the energy scale of 10 K for cuprates. Stripe period increases with decreasing hole doping δ, which agrees with the experiments for La-based cuprates at δ=1/8. For lower δ, we find a phase separation. Implications of the emergent attraction for cuprates are discussed.

本文言語English
論文番号045138
ジャーナルPhysical Review B
97
4
DOI
出版ステータスPublished - 2018 1 22
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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