Novel low-energy collective excitation at metal surfaces
Novel low-energy collective excitation at metal surfaces
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DOI：
10.1209/epl/i2003-10184-1
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发表时间：
2004-02
期刊：
影响因子：
1.8
通讯作者：
V. Silkin;Aran Garcia-Lekue;J. M. Pitarke;E. Chulkov;E. Zaremba;P. Echenique
中科院分区：
文献类型：
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作者：
V. Silkin;Aran Garcia-Lekue;J. M. Pitarke;E. Chulkov;E. Zaremba;P. Echenique
一种新的集体激发被预测存在于金属表面的二维表面态带共存的基础三维连续。这是一种低能量的声学等离子体激元，在小波矢量处具有线性色散。由于新的现代光谱学对费米能级附近的表面动力学特别敏感，因此表面态诱导的声等离子体激元的存在预计将在各种新现象中发挥关键作用，并创造具有潜在新物理的情况。
A novel collective excitation is predicted to exist at metal surfaces where a two-dimensional surface state band coexists with the underlying three-dimensional continuum. This is a low-energy acoustic plasmon with linear dispersion at small wave vectors. Since new modern spectroscopies are especially sensitive to surface dynamics near the Fermi level, the existence of surface-state–induced acoustic plasmons is expected to play a key role in a large variety of new phenomena and to create situations with potentially new physics.