dc.contributor.author |
Kumar, Pramod
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dc.contributor.author |
Vidhyadhiraja, N. S.
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dc.date.accessioned |
2017-02-21T09:35:41Z |
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dc.date.available |
2017-02-21T09:35:41Z |
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dc.date.issued |
2014 |
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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 |
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dc.identifier.citation |
23 |
en_US |
dc.identifier.issn |
1098-0121 |
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dc.identifier.uri |
https://libjncir.jncasr.ac.in/xmlui/10572/2580 |
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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 |
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dc.description.uri |
http://dx.doi.org/10.1103/PhysRevB.90.235133 |
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dc.language.iso |
English |
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dc.publisher |
American Physical Society |
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dc.rights |
@American Physical Society, 2014 |
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dc.subject |
Condensed Matter Physics |
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dc.subject |
Periodic Anderson Model |
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dc.subject |
Mean-Field Theory |
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dc.subject |
Infinite Dimensions |
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dc.subject |
Liquid Behavior |
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dc.subject |
Renormalization-Group |
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dc.subject |
Intermediate Valence |
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dc.subject |
Quantum Criticality |
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dc.subject |
Electron-Systems |
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dc.subject |
Metals |
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dc.subject |
Temperature |
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dc.title |
Kondo-hole substitution in heavy fermions: Dynamics and transport |
en_US |
dc.type |
Article |
en_US |