Critical Current of Low-Angle Grain Boundaries in High-Tc Superconductors
نویسندگان
چکیده
منابع مشابه
Critical Current of Low-Angle Grain Boundaries in High-Tc Superconductors
Dependence of the critical current on the misorientation angle in high-temperature superconductor [001] tilt bicrystal is theoretically examined. We suppose that in the case of relatively small values of the bicrystal misorientation angle θ (θ ≤ 10÷15) the critical current is determined by depinning of vortices, which are locked by edge dislocations aligned along the bicrystal grain boundary. D...
متن کاملE ects of grain boundaries on the critical current of high - Tc superconductorsHubert
We study the temperature dependence of the Josephson critical current for diierent symmetries of the superconducting state. We generalize Zaitsev's model for a smooth interface to include diiuse scattering of quasiparticles at the boundary. For d-wave symmetry, we nd strong deviations from the Ambegaokar-Baratoo (AB) formula for SIS junctions. Similar results are obtained for s-wave superconduc...
متن کاملTransition between Low and High Angle Grain Boundaries
Institut für Metallkunde und Metallphysik, RWTH Aachen, 52056 Aachen, Germany Carnegie Mellon University, Pittsburgh PA 15213, USA Abstract The migration of planar, symmetric tilt grain boundaries with different tilt axes was investigated. The driving force for the grain boundary migration was due to an external mechanical stress field. Low as well as high angle grain boundaries can move under ...
متن کاملQuasiclassical Theory of Twin Boundaries in High-Tc Superconductors
We investigate the electronic structure of twin boundaries in orthorhombically distorted high-Tc materials using the quasiclassical theory of superconductivity. At low temperatures we find a local instability to a time-reversal symmetry breaking state at the twin boundary. This state yields spontaneous currents along the twin boundary that are microscopically explained by the structure of the q...
متن کاملCurrent transport along grain boundaries in d-wave superconductors
The use of a classic phase retrieval algorithm has been previously used to determine the local critical current Jc(x) along the length of grain boundary Josephson junctions that can be characterized using a standard s-wave model. The phase retrieval approach has been modified for use with d-wave dominated superconductors to allow for negative local currents along the boundary. In general soluti...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Universal Journal of Physics and Application
سال: 2013
ISSN: 2331-6535,2331-6543
DOI: 10.13189/ujpa.2013.010214