Analyzing Intrinsic Superconducting Gap by Means of Measurement of Bi_2Sr_2CaCu_2O_<8+x> Superconductors

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概要

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• For the mechanism of high-T_c superconductivity in inhomogeneous Bi_2Sr_2CaCu_2O_<8+x> superconductors, we demonstrate the intrinsic superconducting gap, Δ_i, and pairing symmetry by using a developed Δ = Δ_i/p, where Δ is the observed energy gap and 0 < p ≤ 1 is band filling. When p = 1, Δ = Δ_i ≤ 10meV, measured at a node, is intrinsic. When 0 < p < 1, Δ implies an averaging of Δ_i, over the measurement region, which is an effect of the measurement. From spectra of the density of states (DOS), b = 2Δ_i/k_BT_c is less than 4 when p = 1 and the DOS indicates s-wave symmetry. The superconducting gap anisotropy is attributed to the inhomogeneity of the metal phase and the insulating d-wave phase in the measurement region.

• 社団法人日本物理学会の論文
• 2002-09-15

著者

• Kim Hyun-tak

  Telecom. Basic Research Lab. Etri

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• Analyzing Intrinsic Superconducting Gap by Means of Measurement of Bi_2Sr_2CaCu_2O_ Superconductors

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