Controlling adsorbate vibrational lifetimes using superlattices

被引：0
|
作者：
Lewis, SP [1 ]
Rappe, AM
机构：
[1] Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA
[2] Univ Georgia, Ctr Simulat Phys, Athens, GA 30602 USA
[3] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA
[4] Univ Penn, Res Struct Matter Lab, Philadelphia, PA 19104 USA
来源：
PHYSICAL REVIEW B | 2001年 / 63卷 / 08期
关键词：
D O I：
10.1103/PhysRevB.63.085402
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We propose using short-period superlattices as substrates to control the vibrational relaxation dynamics of adsorbate overlayers. The mass modulation of superlattices creates both band gaps and large spectral enhancements in the phonon density of states. These modifications can dramatically alter the coupling between vibrational modes of the adsorbate overlayer and the substrate lattice, thereby significantly affecting the lifetime of adsorbate modes.
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页数：5
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