| Electron—Phonon Coupling in Anion Metallic Solids and Superconducting MgB2 |
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| 作者姓名： | 尹道乐 杨帆 等 |
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| 作者单位： | DepartmentofPhysics,PekingUniversity,Beijing100871 |
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| 摘 要： | We analyse the Hopfield factor of the newly found superconductor MgB2 using the linear muffin-tin orbital method.Based on a uniform transferred charge density model raised,it is shown from our calculation that the high difference of electronegativity between boron and magnesium favours the high l(l 1) angular momentum hybridization and then the Hopfield factor.Our analysis is consistent with experimental results.Comparisons with cuprate superconductors are also discussed.
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| 关 键 词： | 超导材料 MgB2 金属固体 电子声子耦合 |
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