746 research outputs found
Tunneling conductance in normal metal - triplet superconductor junction
We calculate the tunneling conductance spectra of a normal metal / insulator
/ triplet superconductor from the reflection amplitudes using the
Blonder-Tinkham-Klapwijk (BTK) formula. For the triplet superconductor we
assume one special p-wave order parameter having line nodes and two two
dimensional -wave order parameters with line nodes breaking the
time-reversal symmetry. Also we examine nodeless pairing potentials. The
tunneling peaks are due to the formation of bound states for each surface
orientation at discrete quasiparticles trajectory angles. The tunneling spectra
can be used to distinguish the possible candidate pairing states of the
superconductor SrRuO.Comment: 4 pages with 3 figures, presented at the second Euroconference on
Vortex Matter in Superconductors, 15-25 September 2001, Crete, Greec
Interface effects in superconductor-nanotubes hybrid structures
The objective of the present paper is to investigate the proximity effect in
junctions of superconductors with carbon nanotubes. The method is the lattice
BdG equations within the Hubbard model. The proximity effect depends
sensitively on the connection giving the possibility to control the proximity
effect by performing simple geometrical changes in the hybrid systemComment: 12 pages, 19 figure
Resonant propagation of fluxons in corner junctions with triplet pairing symmetry
We present the numerical solutions for the I-V characteristics, and describe
the motion of fluxons in a frustrated Josephson junction made of an
unconventional triplet superconductor and an s-wave superconductor. In the
inline geometry, and long length limit the moving integer fluxon interacts with
the bound fractional fluxon but is not able to change its position or polarity.
We observe different modes of multifluxon propagation. In the small length
limit the moving fluxon is a combination of the stable solutions that exist in
the static case and additional steps are introduced in the I-V diagram.Comment: 19 pages, 8 figure
Proximity effect in ferromagnet-superconductor hybrid structures: role of the pairing symmetry
The spatial variations of the pair amplitude, and the local density of states
in d-wave or s-wave superconductor-ferromagnet hybrid structures are calculated
self consistently using the Bogoliubov-deGennes formalism within the two
dimensional extended Hubbard model. We describe the proximity effect in
superconductor / ferromagnet (SF) bilayers, FSF trilayers, and interfaces
between a superconductor and a ferromagnetic domain wall. We investigate in
detail the role played by the pairing symmetry, the exchange field, interfacial
scattering and crossed Andreev reflection.Comment: 27 pages, 14 figure
Subproject 2: Sheep: Ethical Problems and Breeding Goals
- Lately production of various sheep and goat products has been raised especially in Mediterranean countries which have a long tradition in breeding such animals
- Sheep and goat breeding in those countries in fact in the best choice in order to exploit the specific area and climate condition
Characterisation of small ruminant production in Crete
Subproject 2 of the LowInputBreeds project aims to improve performance, animal health & welfare, and product quality in organic and low input breed sheep production systems. One focus is breeding under Mediterranean condition
- …