119 citations · 209 across the 8 of their papers we have counts for
5 papers · 1 filter
Spin-orbital frustrations and anomalous metallic state in iron-pnictide superconductors
F. Krüger, S. Kumar, J. Zaanen +1
We develop an understanding of the anomalous metal state of the parent compounds of recently discovered iron based superconductors starting from a strong coupling viewpoint, includ…
Charge ordering and magnetism in quarter-filled Hubbard-Holstein model
Sanjeev Kumar, Jeroen van den Brink
We study a two-dimensional Hubbard-Holstein model with phonons treated in the adiabatic limit. A Hartree-Fock decomposition is employed for the Hubbard term. A range of electronic…
Mott State and Quantum Critical Points in Rare-Earth Oxypnictides ()
Gianluca Giovannetti, Sanjeev Kumar, Jeroen van den Brink
We investigate the magnetic phase diagram of the newly discovered iron-based high temperature oxypnictide superconductors of the type ROFFeAs, with rare earths R=La, S…
Disorder-induced orbital ordering in doped manganites
Sanjeev Kumar, Arno P. Kampf
We study the effect of quenched disorder on the ordering of orbital and magnetic degrees of freedom in a two-dimensional, two-band double-exchange model for electrons coupled…
Two-Zero Symmetric Neutrino Mass Matrices in Minimal Supersymmetric SO(10)
S. Dev, Sanjeev Kumar
The phenomenological neutrino mass matrix for two-zero symmetric texture has been obtained and used to rule out all possible two-zero symmetric neutrino mass matrices obtained from…