Ground State Properties of the Coupled Spin-Fermion Model in the Weak Kondo Coupling Region

Nobuo Furukawa, Masatoshi Imada

研究成果: Article

17 引用 (Scopus)

抄録

Two dimensional coupled spin-fermion model as a model for high-Tc oxide is examined by using the perturbation method and the spin wave approximation in the weak Kondo coupling region. The logarithmic singularity appears in the fermion self energy. It is shown that one fermion doped into the Heisenberg spin system forms the self-trapped states of the fermion and spins. The doped many fermions remains localized as the self-trapped states below the critical fermion concentration. The relation to the Kondo effect is discussed. The relevance of our results to optical and photoemission experiments in high-Tc oxides is also discussed.

元の言語English
ページ(範囲)1771-1791
ページ数21
ジャーナルjournal of the physical society of japan
59
発行部数5
DOI
出版物ステータスPublished - 1990 1 1
外部発表Yes

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fermions
ground state
oxides
Kondo effect
magnons
photoelectric emission
perturbation
approximation
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

これを引用

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AB - Two dimensional coupled spin-fermion model as a model for high-Tc oxide is examined by using the perturbation method and the spin wave approximation in the weak Kondo coupling region. The logarithmic singularity appears in the fermion self energy. It is shown that one fermion doped into the Heisenberg spin system forms the self-trapped states of the fermion and spins. The doped many fermions remains localized as the self-trapped states below the critical fermion concentration. The relation to the Kondo effect is discussed. The relevance of our results to optical and photoemission experiments in high-Tc oxides is also discussed.

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