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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >The high-temperature superconductor gap equation
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The high-temperature superconductor gap equation

机译：高温超导体间隙方程

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摘要

The expressions for superconducting gap (SG) have been derived using the quantum dynamical many-body theory of electron density of states for high-temperature superconductors (HTSs). The developed two-gap equations depend on the temperature, Fermi energy and renormalized electron and phonon energies that emerge as signatures of anharmonic effects. The computation of the SG compared with the Bardeen-Cooper-Schrieffer gap is found to be in good agreement in the low-temperature region with slight deviation near the critical temperature (T-c). The gap equation reveals anisotropic nature and the reduced gap ratio (2 Delta/k(B)T(C) similar or equal to 7.2- 7.5 for YBa2Cu3O7-delta) is found in the upper limit of the reduced gap ratio for HTSs. Both the SG equations approach the same critical temperature. The pairing potential is derived using the SG equation and numerically analyzed for YBa2Cu3O7-delta, which shows that T-C depends on the strength of the pairing potential and we explore the possibilities to elevate the transition temperature T-c.
机译：通过用于高温超导体（HTSS）的Quantum动态的电子密度的电子密度来得出超导间隙（SG）的表达。开发的双间隙方程依赖于温度，费米能量和重字的电子和源性能量，作为厌氧效应的签名。与BARDEEN-COOPER-SCHRIEFFER间隙相比，SG的计算在低温区域中，在临界温度（T-C）附近具有略微偏差的良好一致。间隙方程揭示了各向异性性质，并且在HTSS降低的间隙比的上限上发现了各向异性性质（2倍/ k（B）类似或类似于7.2-7.5的达到7.2-7.5）。 SG方程都接近相同的临界温度。使用SG方程来导出配对电位，并为YBA2Cu3O7-Delta进行数值分析，表明T-C取决于配对电位的强度，并且我们探讨了提升过渡温度T-C的可能性。

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