Quantum phase transition in a gapped Anderson model: A numerical renormalization group study | |
Article | |
关键词: DILUTE MAGNETIC-ALLOYS; STATIC PROPERTIES; KONDO PROBLEM; IMPURITY; SYSTEMS; | |
DOI : 10.1103/PhysRevB.81.235106 | |
来源: SCIE |
【 摘 要 】
We use the numerical renormalization group method to investigate the spectral properties of a single-impurity Anderson model with a gap delta across the Fermi level in the conduction-electron spectrum. For any finite delta > 0, at half filling the ground state of the system is always a doublet. Away from half filling a quantum phase transition (QPT) occurs as function of the gap value delta,and the system evolves from the strong-coupling (SC) Kondo-type state, corresponding to delta
【 授权许可】
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