ORBITALLY-DRIVEN MAGNETISM IN CORRELATED ELECTRON SYSTEMS

Strongly correlated electron systems.

Strongly correlated electron systems.

Coexistence of spin-triplet superconductivity with magnetism within a single mechanism for orbitally degenerate correlated electrons: statistically consistent Gutzwiller approximation

An orbitally degenerate two-band Hubbard model is analyzed with the inclusion of the Hund’s rule-induced spin-triplet even-parity paired states and their coexistence with magnetic ordering. The so-called statistically consistent Gutzwiller approximation (SGA) has been applied to the case of a square lattice. The superconducting gaps, the magnetic moment and the free energy are analyzed as a fun...

Synchronized charge oscillations in correlated electron systems

1Department of Electrical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA, 2School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA, 3Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA, 4Department of Materials Science and Engineering, Pennsylvania State Univers...

A simple model for magnetism in itinerant electron systems

A new lattice model of interacting electrons is presented. It can be viewed as a classical Hubbard model in which the energy associated to electron itinerance is proportional to the total number of possible electron jumps. Symmetry properties of the Hubbard model are preserved. In the half-filled band with strong interaction the model becomes the Ising model. The main features of the magnetic b...