ANHARMONIC LINEWIDTH BROADENING OF SURFACE PHONONS

被引:10
|
作者
KERN, K [1 ]
BECHER, U [1 ]
ZEPPENFELD, P [1 ]
COMSA, G [1 ]
HALL, B [1 ]
MILLS, DL [1 ]
机构
[1] UNIV CALIF IRVINE, DEPT PHYS, IRVINE, CA 92717 USA
关键词
D O I
10.1016/0009-2614(90)87183-R
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The first measurement of the temperature-dependent intrinsic linewidth of a surface phonon is reported. The linewidth of the vertically polarized L1-surface phonon of rare gas bilayer crystals is found to increase linearly with temperature. Anharmonic linewidths calculated by inclusion of cubic terms in the expansion of the rare gas pair potentials are in accord with the experimental data, indicating two-phonon processes as the cause of broadening. © 1990.
引用
收藏
页码:362 / 366
页数:5
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