3 papers
cond-mat.mes-hall2004
Interplay between exchange interactions and charging effects in metallic grains
Pablo San-Jose, Carlos P. Herrero, Francisco Guinea +1
We study the effect of the exchange interactions in small superconducting grains near the Coulomb blockade regime. We extend the standard description of the grain in terms of a sin…
cond-mat.str-el1997
Phase Diagram of Doped Manganates
Daniel P. Arovas, Francisco Guinea
The phase diagram of doped manganate compounds La_{1-x}A_xMnO_3 (with divalent A) is studied. We analyze an extension of the double exchange model using the Schwinger boson formali…
cond-mat1995
TDAE-\c60: Can a Mott insulator be a ferromagnet?
Daniel P. Arovas, Assa Auerbach
Motivated by the structure of TDAE-\c60, we derive a multicomponent superexchange Hamiltonian for the spins and orbital (``isospin'') degrees of freedom in the Mott-insulating phas…