2012/05/04 by Yasuyuki Kato, Gia-Wei Chern, K. A. Al-Hassanieh +3 · 11 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Charge (physics) #Charge ordering #Condensed matter physics #Coupling (piping) #Crossover #Delocalized electron #Electron #Ferromagnetism #Hamiltonian (control theory) #Hubbard model #Magnetic and transport properties of perovskites and related materials #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Strongly correlated material #Superconductivity #Vanadium #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.108.247215
published in Physical Review Letters 108(24), 247215 (American Physical Society)
arxiv created 2012/05/04 · openalex publication_date 2012/06/15 · arxiv updated 2012/08/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Motivated by recent experiments on vanadium spinels, AV2O4, that show an increasing degree of electronic delocalization for smaller cation sizes, we study the evolution of orbital ordering (OO) between the strong and intermediate-coupling regimes of a multiorbital Hubbard Hamiltonian. The underlying magnetic ordering of the Mott insulating state leads to a rapid suppression of OO due to enhanced charge fluctuations along ferromagnetic bonds. Orbital double occupancy is rather low at the transition point indicating that the system is in the crossover region between strong and intermediate-coupling regimes when the orbital degrees of freedom become disordered.