Effects of isotope disorder on energies and lifetimes of phonons in germanium
Effects of isotope disorder on energies and lifetimes of phonons in germanium
复制标题
同位素紊乱对锗中声子能量和寿命的影响
DOI：
10.1103/physrevb.58.10510
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发表时间：
1998
影响因子：
3.7
通讯作者：
E. Haller
中科院分区：
文献类型：
--
作者：
A. Göbel;Di Wang;M. Cardona;L. Pintschovius;W. Reichardt;J. Kulda;N. Pyka;K. Itoh;E. Haller
分别基于相干势近似和大超原胞。对于样品的质量方差，两种方法得到了与实验数据相当一致的结果。这种一致性对于超原胞计算来说稍微好一点。进行较大的质量方差g的计算显示，然而，这两种方法产生显着不同的结果时，g是大于3 310 23。@S0163 - 1829~98! 02938-5#
based on the coherent potential approximation and on large supercells, respectively. For the mass variance of our sample, the two methods lead to rather similar results that agree with the experimental data. This agreement is marginally better for the supercell calculations. Calculations performed for larger mass variances g revealed, however, that the two approaches yield significantly different results when g is larger than 3 310 23 . @S0163-1829~98!02938-5#