Kondo effect of single Co adatoms on Cu surfaces -: art. no. 096804
Kondo effect of single Co adatoms on Cu surfaces -: art. no. 096804
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DOI：
10.1103/physrevlett.88.096804
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发表时间：
2002-03-04
影响因子：
8.6
通讯作者：
Kern, K
中科院分区：
文献类型：
--
作者：
Knorr, N;Schneider, MA;Kern, K
用扫描隧道谱研究了Co原子在铜(100)和铜(111)表面的Kondo共振。我们证明了近藤温度T-K在磁性杂质处随宿主电子密度的变化而变化。隧道谱的定量分析表明，近藤共振主要是由铜体电子主导的。而在Cu(100)表面，隧道进入杂化局域态和进入衬底导带都对近藤共振有贡献，而后者对Cu(111)起主导作用。
The Kondo resonance of Co adatoms on the Cu(100) and Cu(111) surfaces has been studied by scanning tunneling spectroscopy. We demonstrate the scaling of the Kondo temperature T-K with the host electron density at the magnetic impurity. The quantitative analysis of the tunneling spectra reveals that the Kondo resonance is dominated by the Cu bulk electrons. While at the Cu(100) surface both tunneling into the hybridized localized state and into the substrate conduction band contribute to the Kondo resonance, the latter channel is found to be dominant for Cu(111).