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Kondo-hole substitution in heavy fermions: Dynamics and transport

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dc.contributor.author Kumar, Pramod
dc.contributor.author Vidhyadhiraja, N. S.
dc.date.accessioned 2017-02-21T09:35:41Z
dc.date.available 2017-02-21T09:35:41Z
dc.date.issued 2014
dc.identifier.citation Kumar, P; Vidhyadhiraja, NS, Kondo-hole substitution in heavy fermions: Dynamics and transport. Physical Review B 2014, 90 (23), 235133 http://dx.doi.org/10.1103/PhysRevB.90.235133 en_US
dc.identifier.citation Physical Review B en_US
dc.identifier.citation 90 en_US
dc.identifier.citation 23 en_US
dc.identifier.issn 1098-0121
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2580
dc.description Restricted Access en_US
dc.description.abstract Kondo-hole substitution is a unique probe for exploring the interplay of interactions, f-electron dilution, and disorder in heavy-fermion materials. Within the diluted periodic Anderson model, we investigate the changes in single-particle dynamics as well as response functions, as a function of Kondo-hole concentration (x) and temperature. We show that the spectral weight transfers due to Kondo-hole substitution have characteristics that are different from those induced by temperature; the dc resistivity crosses over from a highly nonmonotonic form with a coherence peak in the x -> 0 limit to a monotonic single-impurity-like form that saturates at low temperature. The thermopower exhibits a characteristic maximum as a function of temperature, the value of which changes sign with increasing x, and its location is shown to correspond to a low energy scale of the system. The Hall coefficient also changes sign with increasing x at zero temperature and is highly temperature dependent for all x. As x is increased beyond a certain x(c), the Drude peak and the mid-infrared peak in the optical conductivity vanish almost completely; a peak in the optical scattering rate melts and disappears eventually. We discuss the above-mentioned changes in the properties in terms of a crossover from coherent, Kondo lattice behavior to single-impurity-like, incoherent behavior with increasing x. A comparison of theory with experiments carried out for the dc resistivity and the thermopower of Ce1-xLaxB6 yields good agreement. en_US
dc.description.uri 1550-235X en_US
dc.description.uri http://dx.doi.org/10.1103/PhysRevB.90.235133 en_US
dc.language.iso English en_US
dc.publisher American Physical Society en_US
dc.rights @American Physical Society, 2014 en_US
dc.subject Condensed Matter Physics en_US
dc.subject Periodic Anderson Model en_US
dc.subject Mean-Field Theory en_US
dc.subject Infinite Dimensions en_US
dc.subject Liquid Behavior en_US
dc.subject Renormalization-Group en_US
dc.subject Intermediate Valence en_US
dc.subject Quantum Criticality en_US
dc.subject Electron-Systems en_US
dc.subject Metals en_US
dc.subject Temperature en_US
dc.title Kondo-hole substitution in heavy fermions: Dynamics and transport en_US
dc.type Article en_US


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