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CsI高压超导电性的第一性原理

辛春雨1, 张淼2, 崔田2, 马琰铭2, 邹广田2   

  1. 1. 白城师范学院 物理系, 吉林省 白城 137000; 2. 吉林大学 超硬材料国家重点实验室, 长春 130012
  • 收稿日期:2005-11-13 修回日期:1900-01-01 出版日期:2006-07-26 发布日期:2006-07-26
  • 通讯作者: 马琰铭

First-principles Investigation of the Superconductivity in CsI under High Pressure

XIN Chun-yu1, ZHANG Miao2, CUI Tian2, MA Yan-ming2, ZOU Guang-tian2   

  1. 1. Department of Physics, Baicheng Normal College, Baicheng 137000, Jilin Province, China; 2. National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2005-11-13 Revised:1900-01-01 Online:2006-07-26 Published:2006-07-26
  • Contact: MA Yan-ming

摘要: 利用基于密度泛函理论的赝势平面波方法计算了高压下CsI的电子能带结构、 电子态密度、 声子谱、 声子态密度以及电子和声子的相互作用, 探讨了CsI在高压下产生超导电性的物理机制. 研究表明, CsI层内的光学振动模式与电子之间的强耦合作用是CsI产生超导电性的主要原因.

关键词: 高压, 超导电性, CsI

Abstract: The band structure, electronic density of states, phonon dispersion, phonon density of states, and electron-phonon coupling in CsI under high pressure were explored via planewave pseudopotential method based on density functional theory. Thus, the physical origin of the superconductivity of CsI under pressure has been probed. The theoretical results suggest that the in\|plane optical vibrational modes couple strongly with electrons, resulting in the observed superconductivity in CsI. 

Key words: high pressure, superconductivity, CsI

中图分类号: 

  • O521.21