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<p>In order to analyze theoretically the magnetic-ion-dilution effect on electronic states of valence fluctuating systems, we have used the periodic Anderson model (PAM) which is a theoretical model for valence fluctuating systems and calculated some physical quantities including the density of states and the magnetic susceptibility of the PAM. We have applied the self-consistent second-order perturbation theory to the PAM to treat the electron correlation and have used the coherent potential approximation to treat the magnetic-ion-dilution effect in the system. In the present study, it is shown that the effective <i>c</i>-<i>f</i> hybridization vanishes and the conduction-electron and <i>f</i>-electron parts of the electronic state gradually separate and the value of the Pauli paramagnetism at absolute zero decreases monotonically as the non-magnetic impurity concentration increases.</p>

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Model Analysis for Magnetic-Ion-Dilution Effects on Electronic States of Valence Fluctuating Systems

  • 期刊论文

  • 发表日期：

    2026年5月23日

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  • Tetsuya Mutou,
  • Tomoka Tsuchie

摘要

In order to analyze theoretically the magnetic-ion-dilution effect on electronic states of valence fluctuating systems, we have used the periodic Anderson model (PAM) which is a theoretical model for valence fluctuating systems and calculated some physical quantities including the density of states and the magnetic susceptibility of the PAM. We have applied the self-consistent second-order perturbation theory to the PAM to treat the electron correlation and have used the coherent potential approximation to treat the magnetic-ion-dilution effect in the system. In the present study, it is shown that the effective c-f hybridization vanishes and the conduction-electron and f-electron parts of the electronic state gradually separate and the value of the Pauli paramagnetism at absolute zero decreases monotonically as the non-magnetic impurity concentration increases.