175 research outputs found
On the Origin of the Solar Wind
Hydrodynamic mechanism of solar corona expansio
Topological states of multiband superconductors with interband pairing
We study the effects of interband pairing in two-band s-wave and d-wave
superconductors with D4h symmetry in both time-reversal invariant as well as
time-reversal symmetry breaking states. The presence of interband pairing
qualitatively changes the nodal structure of the superconductor: nodes can
(dis)appear, merge, and leave high-symmetry locations when interband pairing is
tuned. Furthermore, in the d-wave case, we find that also the boundary modes
change qualitatively when interband pairing increases: flat zero-energy Andreev
bound states gap out and transition to helical edge states.Comment: 19 pages, 11 figure
Probing interfacial pair breaking in tunnel junctions based on the first and the second harmonics of the Josephson current
It will be shown that a pronounced interfacial pair breaking can be
identified in Josephson tunnel junctions provided the first j_{1c} and the
second j_{2c} harmonics of the supercurrent, as well as the depairing current
in the bulk j_{dp}, are known. Namely, within the Ginzburg-Landau theory a
strong interfacial pair breaking results in the relation
j_{2c}j_{dp}>>j_{1c}^2, while in standard junctions, with negligibly small pair
breaking, the relation of opposite character takes place.Comment: 6 pages, published versio
NMR relaxation rate in non-centrosymmetric superconductors
The spin-lattice relaxation rate of nuclear magnetic resonance in a clean
superconductor without inversion center is calculated for arbitrary pairing
symmetry and band structure, in the presence of strong spin-orbit coupling.Comment: 4 page
Determining the superconducting gap structure in Sr2RuO4 from sound attenuation studies below Tc
This work presents a quantitative theoretical study of the sound attenuation
in the unconventional multiband superconductor Sr2RuO4 below the
superconducting transition temperature Tc. Sound attenuation in this material
is shown to have the remarkable property of being able to identify different
nodal structures on different bands. The nodal structures on the \gamma band on
the one hand, and on the \alpha and \beta bands on the other, are both found to
be characterized by the existence of point nodes, but are significantly
different in their quantitative aspects.Comment: 7 pages, REVTe
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