3 papers
cond-mat.str-el2006
Model of the Interplay of Band J-T Effect with Magnetic Order Mediated by Exchange Interaction
G. Gangadhar Reddy, A. Ramakanth, S. K. Ghatak +3
A model calculation is presented with the aim to study the interplay between magnetic and structural transitions. The model consists of an orbitally doubly degenerate conduction ba…
cond-mat.mtrl-sci2004
Carrier induced ferromagnetism in concentrated and diluted local-moment systems
W. Nolting, T. Hickel, A. Ramakanth +2
For modeling the magnetic properties of concentrated and diluted magnetic semiconductors, we use the Kondo-lattice model. The magnetic phase diagram is derived by inspecting the st…
cond-mat.str-el2002
Self-energy approach to the correlated Kondo-lattice model
W. Nolting, G. G. Reddy, A. Ramakanth +2
We develop an interpolating self-energy approach to the correlated Kondo-lattice model. The correlation of the band electrons is taken into account by a Hubbard interaction. The me…