On Field-Induced Quantum Criticality in YbRh_{2}Si_[2}

Details On Field-Induced Quantum Criticality in YbRh_{2}Si_[2} On Field-Induced Quantum Criticality in YbRh_{2}Si_[2}

2008-11-23

arxiv.org/abs/0811.3767v1

Physics

Condensed Matter

Strongly Correlated Electrons

4++ pages, submitted to Phys. Rev. Lett

Scientific paper

The quantum critical point (QCP) in $YbRh_{2}Si_{2}$ is an enigma for the itinerant view of QCP. In an alternative view, this QCP is intimately linked to the selective Mott localization of the heavy $f$ electrons. Following a perusal of this unusual QCP, I study an Extended Periodic Anderson Model (EPAM) within DMFT. A quantum phase transition (FQPT), accompanied by a rapid change in the Fermi volume, is found near the quantum-critical end-point of the selective Mott transition in the $f$-electron sector. The theory accounts for a wide range of unusual, singular non-Fermi liquid features exhibited at this QCP in $YbRh_{2}Si_{2}$ in a natural way.

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