journal6 ›› 2004, Vol. 25 ›› Issue (1): 71-74.

• 重点学科 • 上一篇    下一篇

热膨胀对固体能带结构的影响

  

  1. ( 1. 湘潭大学物理系, 湖南湘潭411105; 2. 吉首大学物理与电子工程系, 湖南吉首416000)
  • 出版日期:2004-03-15 发布日期:2012-11-06
  • 作者简介:李德俊( 1956- ) , 男, 湖南省澧县人, 吉首大学物理与电子工程系副教授, 主要从事凝聚态物理研究.
  • 基金资助:

    湖南省自然科学基金资助项目( 03JJY6008) ; 湖南省教育厅自然科学基金资助项目( 00C189)

The Influences of the Thermal Expansion on the Energy Band Structure of a Solid

  1. ( 1. Department of Physics, Xiangtan University, Xiangtan 411105, Hunan China; 2. Department of Physics and Electronic Engineering, Jishou University, Jishou 416000,Hunan China)
  • Online:2004-03-15 Published:2012-11-06

摘要:以体心立方结构为例, 利用紧束缚理论, 讨论了热膨胀对固体能带结构的影响, 具体计算了体心立方晶格的1S能带和2S 能带. 结果表明: 随着温度的上升, 热膨胀将使固体的晶格常数发生变化, 使得1S 和2S 的能带中心和能带动边缘产生移动, 从而对各能带的宽度和两带之间的禁带宽度都产生影响. 所得结论能较好地说明锂金属的部分实验结果.

关键词: 热膨胀, 能带宽度, 禁带宽度

Abstract: Using the t ight- binding theory, the influences of the thermal expansion on the energy band structure of the solid with a body- centered cubic lattice was discussed, the 1S and 2S energy bands of body- centered cubic lattice were calculated. The results show that with the increase of temperature, the thermal expansion makes lattice constant change, which will result in the shifts of the center of the 1S and 2S energy bands and the energy band edge; therefore,
the width of every energy band and the forbidden band- width between two bands will change.These results can explain fairly the partial experimental results of the Li metal.

Key words:  , thermal expansion, energy band- width, forbidden band- width

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