Screening of a magnetic impurity in a quasicrystal

13th International Conference on Quasicrystals

Jagannathan, Anuradha^1

Laboratoire de Physique des Solides, Université Paris-Sud, Orsay

91400, France^1

关键词: Kondo temperatures;    Local moments;    Low temperature thermodynamics;    Magnetic impurity;    Metallic environments;    Quasi-periodic;    Quasicrystalline phase;    Singular distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/809/1/012021/pdf
DOI  :  10.1088/1742-6596/809/1/012021

来源: IOP

【 摘 要 】

The problem of screening of local moments in a metallic environment is revisited, in the context of quasiperiodic solids. The motivation for this study comes from experimental studies showing that low temperature thermodynamic properties are strongly anomalous in the quasicrystalline phase, but less or not anomalous in the related approximant phase. A model for a magnetic impurity in a quasiperiodic environment is introduced and solved numerically. Arguments are given for the existence of a singular distribution of Kondo temperatures in the quasicrystal, thereby providing a possible explanation for the experimental observations.