Brownian friction of gas molecules on the graphite surface

被引：7
|
作者：
Boutchko, RD [1 ]
Bruch, LW [1 ]
机构：
[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
来源：
PHYSICAL REVIEW B | 1999年 / 59卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.59.10992
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A calculation of the Brownian phononic friction coefficient of an isolated adatom on a crystal surface is formulated and then performed for Kr and N-2 molecules on the {0001} graphite surface. The fluctuating forces on the adatom are expressed in terms of the normal modes of vibration of the substrate atoms. Then, the force autocorrelation functions and friction coefficients are calculated. The graphite phonon frequencies and polarization vectors are calculated for a thick slab using a generalized bond-charge model. There is a strong spatial dependence of the friction coefficient. [S0163-1829(99)13015-7].
引用
收藏
页码：10992 / 10995
页数：4
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