| Al掺杂对MgB_2电子结构和超导电性的影响 |
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| 引用本文： | 支晓芬,侯芹英,苏希玉,程伟,孔祥兰.Al掺杂对MgB_2电子结构和超导电性的影响[J].低温物理学报,2009,31(1). |
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| 作者姓名： | 支晓芬 侯芹英 苏希玉 程伟 孔祥兰 |
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| 作者单位： | 曲阜师范大学物理工程学院;曲阜师范大学图书馆; |
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| 基金项目： | 国家自然科学基金，山东省理论物理重点学科资助的课题 |
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| 摘 要： | 建立了不同Al掺杂浓度的Mg1-xAlxB2模型并进行几何优化,讨论了掺杂对系统几何构型、能带结构、电子态密度、键布居和超导转变温度的影响.结果表明,随着Al掺杂浓度的增加,B-Mg离子键增强,B-B共价键减弱,B-Al间的弱共价键增强,能带展宽,费米面附近的态密度降低,超导电性减弱.
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| 关 键 词： | Al掺杂 电子结构 超导电性 |
Al-DOPTED EFFECT ON THE ELECTRON SRATES AND SUPERCONDUCTIVITY OF MgB_2 SYSTEM |
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| ZHI Xiao-fen HOU Qin-ying SU Xi-yu CHENG Wei KONG Xiang-lanCollege of Physics , Engineering,Qufu Normal University,Sh,ong Qufu ,Library,Qufu ,China.Al-DOPTED EFFECT ON THE ELECTRON SRATES AND SUPERCONDUCTIVITY OF MgB_2 SYSTEM[J].Chinese Journal of Low Temperature Physics,2009,31(1). |
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| Authors: | ZHI Xiao-fen HOU Qin-ying SU Xi-yu CHENG Wei KONG Xiang-lanCollege of Physics Engineering Qufu Normal University Sh ong Qufu Library Qufu China |
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| Institution: | ZHI Xiao-fen HOU Qin-ying SU Xi-yu CHENG Wei KONG Xiang-lanCollege of Physics , Engineering,Qufu Normal University,Sh,ong Qufu 273165,+Library,Qufu 273165,China |
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| Abstract: | Mg1-xAlxB2 models for different Al doping have been presented and optimized. Al-dopted effects on the geometry structure, the band structure, the electron density of states, the bond population, and the superconductivity of the systems have been discussed. The obtained results show that along with the increasing of the Al dopted, the B-Mg ionic bond heightening, the B-B covalent bond lessening, the weak covalent bond heightening, the electron band broadening, the density of states near the Fermi level falli... |
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| Keywords: | Mg1-xAlxB2 |
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