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

M. S. Laad

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

Strongly Correlated Electrons 2008-11-25 v1

Authors: M. S. Laad

Abstract

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.

Keywords

quantum critical point quantum phase transition

Cite

@article{arxiv.0811.3767,
  title  = {On Field-Induced Quantum Criticality in YbRh_{2}Si_[2}},
  author = {M. S. Laad},
  journal= {arXiv preprint arXiv:0811.3767},
  year   = {2008}
}

Comments

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

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