Non-Fermi-Liquid Behavior in Metallic Quasicrystals with Local Magnetic Moments

Autor(es)

Andrade, Eric C. ^[1] ; Jagannathan, Anuradha ^[2] ; Miranda, Eduardo ^[3] ; Vojta, Matthias ^[4] ; Dobrosavljevic, Vladimir ^{[5, 6]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP - Brazil

^[2] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay - France

^[3] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

^[4] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden - Germany

^[5] Florida State Univ, Dept Phys, Tallahassee, FL 32306 - USA

^[6] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 - USA

• Tipo de documento: Artigo Científico
• Fonte: Physical Review Letters; v. 115, n. 3 JUL 14 2015.
• Citações Web of Science: 17

Resumo

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. (AU)

• Processo FAPESP: 13/00681-8 - Magnetos desordenados: estado fundamental, excitações e termodinâmica
• Beneficiário: Eric de Castro e Andrade
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores