55 citations · 174 across the 7 of their papers we have counts for
7 papers
Andreev reflection at half-metal-superconductor interfaces with non-uniform magnetization
Joern N. Kupferschmidt, Piet W. Brouwer
Andreev reflection at the interface between a half-metallic ferromagnet and a spin-singlet superconductor is possible only if it is accompanied by a spin flip. Here we calculate th…
Role of interactions in time-of-flight expansion of atomic clouds from optical lattices
Joern N. Kupferschmidt, Erich J. Mueller
We calculate the effect of interactions on the expansion of ultracold atoms from a single site of an optical lattice. We use these results to predict how interactions influence the…
Enhanced triplet Andreev reflection off a domain wall in a lateral geometry
Joern N. Kupferschmidt, Piet W. Brouwer
We find that the triplet Andreev reflection amplitude at the interface between a half-metal and an s-wave superconductor in the presence of a domain wall is significantly enhanced…
Quantum limit of the triplet proximity effect in half-metal - superconductor junctions
B. Béri, J. N. Kupferschmidt, C. W. J. Beenakker +1
We apply the scattering matrix approach to the triplet proximity effect in superconductor-half metal structures. We find that for junctions that do not mix different orbital modes,…
Temperature and magnetic-field dependence of the quantum corrections to the conductance of a network of quantum dots
Joern N. Kupferschmidt, Piet W. Brouwer
We calculate the magnetic-field and temperature dependence of all quantum corrections to the ensemble-averaged conductance of a network of quantum dots. We consider the limit that…
Interaction correction to the conductance of a ballistic conductor
Piet W. Brouwer, Joern N. Kupferschmidt
In disordered metals, electron-electron interactions are the origin of a small correction to the conductivity, the "Altshuler-Aronov correction". Here we investigate the Altshuler-…