THEORY OF OPTICAL-ABSORPTION IN EXPANDED FLUID MERCURY

被引:64
作者
BHATT, RN
RICE, TM
机构
[1] Bell Laboratories, Murray Hill
来源
PHYSICAL REVIEW B | 1979年 / 20卷 / 02期
关键词
D O I
10.1103/PhysRevB.20.466
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A theory is developed of optical absorption in mercury fluid which is correct in the atomic limit and describes densities up to 4-5 gcm-3. The model takes density fluctuations into account explicitly, and shows that the steep, near-exponential absorption edge observed in mercury can be explained quantitatively in terms of absorption by excitonic states of large randomly distributed clusters. This removes the discrepancy between optical-absorption measurements which indicated the band gap closes around 5 gcm-3 and transport and Knight-shift measurements which showed a metal-insulator transition around 8.5 gcm-3. The model predicts, in qualitative agreement with results of recent reflectivity measurements, that the excitonic absorption is separate at densities even up to 1/4 5 gcm-3. © 1979 The American Physical Society.
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页码:466 / 475
页数:10
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