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Range of biquadratic and triquadratic Heisenberg effective couplings deduced from multiorbital Hubbard models
Rahul Soni, Nitin Kaushal, Cengiz Şen +3
We studied a multi-orbital Hubbard model at half-filling for two and three orbitals per site on a two-site cluster via full exact diagonalization, in a wide range for the onsite re…
Coupled Hubbard ladders at weak coupling: Pairing and spin excitations
Thomas A. Maier, Elbio Dagotto
The Hubbard model provides a simple framework in which one can study how certain aspects of the electronic structure of strongly interacting systems can be tuned to optimize the su…
Prediction of orbital selective Mott phases and block magnetic states in the quasi-one-dimensional iron chain CeOFeSe under hole and electron doping
Ling-Fang Lin, Yang Zhang, Gonzalo Alvarez +3
The recent detailed study of quasi-one-dimensional iron-based ladders, with the iron electronic density , has unveiled surprises, such as orbital-selective phases. Howe…
Theoretical study of the crystal and electronic properties of -RuI
Yang Zhang, Ling-Fang Lin, Adriana Moreo +1
The material -RuCl, with a two-dimensional Ru-honeycomb sublattice, has attracted considerable attention because it may be a realization of the Kitaev quantum spin liquid (Q…
Magnetization dynamics fingerprints of an excitonic condensate magnet
Nitin Kaushal, Jacek Herbrych, Gonzalo Alvarez +1
The competition between spin-orbit coupling and electron-electron interaction leads to a plethora of novel states of matter, extensively studied in the context of $t_{2g}^4…
Multitude of Topological Phase Transitions in Bipartite Dice and Lieb Lattices with Interacting Electrons and Rashba Coupling
Rahul Soni, Amit Bikram Sanyal, Nitin Kaushal +3
We report the results of a Hartree-Fock study applied to interacting electrons moving in two different bipartite lattices: the dice and the Lieb lattices, at half-filling. Both lat…