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Type: | Artigo |
Title: | Non-Fermi-liquid behavior in metallic quasicrystals with local magnetic moments |
Author: | Andrade, E. C. Jagannathan, A. Miranda, E. Vojta, M. Dobrosavljevic, V. |
Abstract: | Motivated by the intrinsic non-Fermi-liquid behavior observed in the heavy-fermion quasicrystal Au51Al34Yb15, we study the low-temperature behavior of dilute magnetic impurities placed in metallic quasicrystals. We find that a large fraction of the magnetic moments are not quenched down to very low temperatures T, leading to a power-law distribution of Kondo temperatures P(T-K) similar to T-K(alpha-1), with a nonuniversal exponent alpha, in a remarkable similarity to the Kondo-disorder scenario found in disordered heavy-fermion metals. For alpha < 1, the resulting singular P(T-K) induces non-Fermi-liquid behavior with diverging thermodynamic responses as T -> 0. Motivated by the intrinsic non-Fermi-liquid behavior observed in the heavy-fermion quasicrystal Au51Al34Yb15, we study the low-temperature behavior of dilute magnetic impurities placed in metallic quasicrystals. We find that a large fraction of the magnetic moments are not quenched down to very low temperatures T, leading to a power-law distribution of Kondo temperatures P(T-K) similar to T-K(alpha-1), with a nonuniversal exponent alpha, in a remarkable similarity to the Kondo-disorder scenario found in disordered heavy-fermion metals. For alpha < 1, the resulting singular P(T-K) induces non-Fermi-liquid behavior with diverging thermodynamic responses as T -> 0. |
Subject: | Função de onda Transformações de fase (Física estatística) Níveis de energia (Mecânica quântica) |
Country: | Estados Unidos |
Editor: | American Physical Society |
Citation: | Non-fermi-liquid Behavior In Metallic Quasicrystals With Local Magnetic Moments. Amer Physical Soc, v. 115, p. Jul-2015. |
Rights: | aberto |
Identifier DOI: | 10.1103/PhysRevLett.115.036403 |
Address: | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.036403 |
Date Issue: | 2015 |
Appears in Collections: | IFGW - Artigos e Outros Documentos |
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000357864800017.pdf | 973.05 kB | Adobe PDF | View/Open |
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