Energy Gap Structure in Bilayer Oxide Superconductors
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概要
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We consider a model for bilayer superconductors where an interlayer pairing amplitude Δ⊥ coexists with intralayer pairing Δ⫽ of d_<x^2-y^2> symmetry. This model is motivated by a recent photoemission experiment reporting the splitting of the nodes of the energy gap. In addition to offering a natural explanation of this observation, the model has a number of new experimental consequences. We find that the new state is accompanied by a spontaneous breaking of the tetragonal symmetry. We also find that the out-of-phase oscillation of Δ⊥ and Δ⫽ gives rise to a new Raman active mode. The phase of Δ⊥ ; may also become imaginary, leading to a state which breaks time reversal symmetry, which may have important implications for tunnelling experiments.
- 社団法人日本物理学会の論文
- 1995-09-15
著者
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Kuboki K
Kobe Univ. Kobe
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Kuboki Kazuhiro
Department Of Physics Kobe University
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Lee A.
Department of Physics, Massachusetts Institute of Technology
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