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The interplay between double exchange, super-exchange, and Lifshitz localization in doped manganites
J. L. Alonso, L. A. Fernandez, F. Guinea +2
Considering the disorder caused in manganites by the substitution of Mn by Fe or Ga, we accomplish a systematic study of doped manganites begun in previous papers. To this end, a d…
Exchange instability of the two-dimensional electron gas in semiconductor quantum wells
A. R. Goñi, U. Haboeck, C. Thomsen +4
A two-dimensional (2D) electron gas formed in a modulation-doped GaAs/AlGaAs single quantum well undergoes a first-order transition when the first excited subband is occupied with…
Order in driven vortex lattices in superconducting Nb films with nanostructured pinning potentials
M. Velez, D. Jaque, J. I. Martin +2
Driven vortex lattices have been studied in a material with strong pinning, such as Nb films. Samples in which natural random pinning coexists with artificial ordered arrays of def…
Monte Carlo determination of the phase diagram of the double-exchange model
J. L. Alonso, J. A. Capitan, L. A. Fernandez +2
We study the phase diagram of the double exchange model, with antiferromagnetic interactions, in a cubic lattice both at zero and at finite temperature. There is a rich variety of…