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首页> 外文期刊>Physica, C. Superconductivity and its applications >Pressure dependence of critical temperature in MgB2 and two-bands Eliashberg theory
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Pressure dependence of critical temperature in MgB2 and two-bands Eliashberg theory

机译：MgB2和两波段Eliashberg理论中的临界温度与压力的关系

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The variation of the superconducting critical temperature T-c as a function of the pressure p in the magnesium diboride MgB2 has been studied in the framework of two-bands Eliashberg theory and traditional phonon coupling mechanism. I have solved the two-bands Eliashberg equations using first-principle calculations or simple assumptions for the variation, with the pressure, of the relevant physical quantities. I have found that the experimental Tc versus p curve can be fitted very well and information can be obtained on the dependence of the electron-phonon interaction matrix < I-2> by pressure. The pressure dependence of the superconductive gaps Delta(sigma), and Delta(pi) is also predicted. (c) 2005 Elsevier B.V. All rights reserved.
机译：在二能带Eliashberg理论和传统声子耦合机理的框架下，研究了超导临界温度T-c作为二硼化镁MgB2中压力p的函数的变化。我已经用第一性原理计算或简单假设通过求解相关物理量随压力的变化来求解两带式Eliashberg方程。我发现实验Tc对p曲线可以很好地拟合，并且可以通过压力依赖电子-声子相互作用矩阵获得信息。还可以预测超导间隙Delta（sigma）和Delta（pi）的压力依赖性。 （c）2005 Elsevier B.V.保留所有权利。

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