Kondo resonance in PrTi2Al20 : Photoemission spectroscopy and single-impurity Anderson model calculations
Kondo resonance in PrTi2Al20 : Photoemission spectroscopy and single-impurity Anderson model calculations
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PrTi2Al20 中的近藤共振：光电子能谱和单杂质安德森模型计算
DOI：
10.1103/physrevb.84.193101
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S.Shin
中科院分区：
文献类型：
--
作者：
M.Matsunami;M.Taguchi;A.Chainani;R.Eguchi;M.Oura;A.Sakai;S.Nakatsuji;S.Shin
对于Ce（4电子）和Yb（4空穴）基体系的电子结构，在费米能级上建立了Kondo共振。在这项工作中，我们报道了在基于pr的4体系PrTiAl中Kondo共振的互补实验和理论研究。利用pr3 -4共振光发射光谱和单杂质安德森模型（SIAM）计算，包括完整的Pr离子多重态，我们证明了4体系也可以在费米能级上产生近道共振。近藤共振峰是通过最终态多重依赖共振实验观察到的，并在SIAM计算中以适当调谐的杂化强度再现。
The Kondo resonance at the Fermi level is well established for the electronic structure of Ce (4electron) and Yb (4hole) -based systems. In this work, we report complementary experimental and theoretical studies on the Kondo resonance in the Pr-based 4system, PrTiAl. Using Pr 3-4resonant photoemission spectroscopy and single-impurity Anderson model (SIAM) calculations including the full multiplets of Pr ions, we show that a 4system can also give rise to a Kondo resonance at the Fermi level. The Kondo resonance peak is experimentally observed through a final-state multiplet-dependent resonance and is reproduced with properly tuned hybridization strength in SIAM calculations.