59 citations · 120 across the 6 of their papers we have counts for
6 papers
Quantum criticality of vanadium chains with strong relativistic spin-orbit interaction
Gia-Wei Chern, N. B. Perkins, G. I. Japaridze
We study quantum phase transitions induced by the on-site spin-orbit interaction lambda(L.S) in a toy model of vanadium chains. In the lambda->0 limit, the decoupled spin and orbit…
Variational study of the antiferromagnetic insulating phase of V2O3 based on Nth order Muffin-Tin-Orbitals
N. B. Perkins, S. Di Matteo, C. R. Natoli
Motivated by recent results of th order muffin-tin orbital (NMTO) implementation of the density functional theory (DFT), we re-examine low-temperature ground-state properties of…
Orbital-spin order and the origin of structural distortion in MgTiO
S. Leoni, A. N. Yaresko, N. Perkins +2
We analyze electronic, magnetic, and structural properties of the spinel compound MgTiO using the local density approximation+U method. We show how MgTiO undergoes…
Doping dependence of the exchange energies in bilayer manganites: Role of orbital degrees of freedom
G. Jackeli, N. B. Perkins
Recently, an intriguing doping dependence of the exchange energies in the bilayer manganites has been observed in the neutron scattering experiments. Th…
Spin-1 effective Hamiltonian with three degenerate orbitals: An application to the case of VO
S. Di Matteo, N. B. Perkins, C. R. Natoli
Motivated by recent neutron and x-ray observations in VO, we derive the effective Hamiltonian in the strong coupling limit of an Hubbard model with three degenerate t_{2g}…
Magnetic and orbital ordering in cuprates and manganites
A. M. Oles, M. Cuoco, N. B. Perkins
The mechanisms of magnetic and orbital interactions due to double exchange (DE) and superexchange (SE) in transition metal oxides with degenerate e_g orbitals are presented. Specif…