Quantum phase transition between orbital-selective Mott states in Hund's metals

Julián Rincón, Adriana Moreo, Gonzalo Alvarez, Elbio Dagotto

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We report a quantum phase transition between orbital-selective Mott states, with different localized orbitals, in a Hund's metals model. Using the density matrix renormalization group, the phase diagram is constructed varying the electronic density and Hubbard U, at robust Hund's coupling. We demonstrate that this transition is preempted by charge fluctuations and the emergence of free spinless fermions, as opposed to the magnetically driven Mott transition. The Luttinger correlation exponent is shown to have a universal value in the strong-coupling phase, whereas it is interaction dependent at intermediate couplings. At weak coupling we find a second transition from a normal metal to the intermediate-coupling phase.

Original languageEnglish (US)
Article number241105
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number24
DOIs
StatePublished - Dec 5 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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