SrVO₃和CaVO₃光电子能谱中的表面与体库仑关联
Surface versus bulk Coulomb correlations in photoemission spectra of SrVO3 and CaVO3.
作者信息
Liebsch A
机构信息
Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany.
出版信息
Phys Rev Lett. 2003 Mar 7;90(9):096401. doi: 10.1103/PhysRevLett.90.096401. Epub 2003 Mar 3.
Recent photoemission spectra of the perovskite series CaxSr1-xVO3 revealed strong modifications associated with surface contributions. To study the effect of Coulomb correlations in the bulk and at the surface, the quasiparticle spectra are evaluated using the dynamical mean field theory. It is shown that as a result of the reduced coordination number of surface atoms correlation effects are stronger at the surface than in the bulk, in agreement with experiment.
最近对钙钛矿系列CaxSr1-xVO3的光发射光谱研究揭示了与表面贡献相关的强烈变化。为了研究体相和表面库仑关联的影响，使用动态平均场理论评估了准粒子光谱。结果表明，由于表面原子的配位数降低，表面的关联效应比体相更强，这与实验结果一致。
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