Probing quasiparticle states bound by disparate periodic potentials.
Probing quasiparticle states bound by disparate periodic potentials.
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探测受不同周期势束缚的准粒子态。
DOI：
10.1103/physrevlett.97.206802
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发表时间：
2006
影响因子：
8.6
通讯作者：
C. Carbone
中科院分区：
文献类型：
--
作者：
P. Moras;L. Ferrari;C. Spezzani;S. Gardonio;M. Ležaić;P. Mavropoulos;S. Blügel;C. Carbone
具有大横向相干性的二维结晶度的Ag（111）薄膜生长在Ge（111）上，与下面的衬底没有面内配准。银s-p电子形成的二维量子阱状态的相干散射在掩埋界面电位，导致一组意想不到的新的准粒子状态，观察到的角度分辨光电发射。这些新的功能源于银量子阱带之间的相互作用，获得相当于衬底晶格的倒易矢量的动量。
Thin films of Ag(111) with two-dimensional crystallinity of large lateral coherence grow on Ge(111), free of in-plane registry with the underlying substrate. Ag s-p electrons forming two-dimensional quantum well states scatter coherently at the buried interface potential, resulting in an unexpected set of new quasiparticle states, as observed by angle-resolved photoemission. These new features originate from interactions among Ag quantum well bands, gaining a momentum equivalent to a reciprocal vector of the substrate lattice.