Consistent Solutions of BCS-Gap Equation for the Hole-Pairing Mechanism by the Exchange of Soft-Magnons in a Frustrated Heisenberg Square-Lattice System

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概要

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• The pairing mechanism for doped holes to d... ,.2 orbitals of Cu" ions on a Cub.plane is proposed so as to make clear the property of superconducting phases of high-T. superconductors where coexistence of the antiferromagnetic ordering has beenrecently reported. The pairing is made by the exchange of antiferromagnetic magnonsfor d.z ,2 spins on Cub. plrtne. Here, the frustration introduced by the secondnearest neighbor antiferromagnetic exchange interaction between Cu" ions plays ansignificant role. The BCS-type gap equation is derived and self-consistent solutionsare obtained numerically for various symmetries. Among them, the gaps for s and d.,symmetries are discussed in detail. By the essential contribution of the frustration, thegap can be formed even for the intermediate coupling region.thigh-7'. oxide superconductors, theory, soft-magnon, frustrated spin system, l% gap-equation, consistent solution}

• 社団法人日本物理学会の論文
• 1989-11-15

著者

• NATSUME Yuhei

  Department of Physics,Chiba University

• Natsume Y

  Chiba Univ. Chiba

• Suzuki Toshihiko

  Department Of Physics Faculty Of Science Chiba University

• Natsume Yuhei

  Department Of Phycics Faculty Of Science Chiba University

• Ohta Atsushi

  Department Of Chemistry And Biotechnology Graduate School Of Engineering The University Of Tokyo

• Ohta Atsushi

  Department Of Physics Faculty Of Science Chiba University

• Atsushi OHTA

  Department of Physics,Faculty of Science,Chiba University

• NOJIMA Masaaki

  Department of Physics,Faculty of Science,Chiba University

• Nojima Masaaki

  Department Of Physics Faculty Of Science Chiba University

• Suzuki Toshihiko

  Department Of Pediatrics Anjo Kosei Hospital

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