Islands of (In-)stability in High Temperature Superconductors
نویسندگان
چکیده
منابع مشابه
Islands of (In-)stability in High Temperature Superconductors
Dendritic flux penetration is a well known phenomenon in high temperature superconductors. We investigated the conditions under which this instability can be observed in different materials. We found three qualitatively different behaviors: dendrite development above a “critical field” and up to a certain temperature, above a “critical field” with no measurable temperature dependence, or no den...
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Tlc variation of nagn.rization wirh ficld in high-icmFr.turc suFrconductors pas calculat.d by cxtcnding thc spin-8tair modcl of Ebn€r and Srroud lC. Ebocr and D. Stroud, phvs. Rcv. B il. 165 (1965)l to incorporalc domains insid! thc Srains. Trro couplin8 .n.r8i.3 wcrc urcd, one bcrwen domains in rhc sinc grain, and a ficld{.pc.dcnt coupli,g cocrgy bcrw.c'l domars tn ditr rcnt trains. Thc 6cld d...
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Based on a model Hamiltonian with competing antiferromagnetic (AF) and d-wave superconductivity interactions, the vortex charge is investigated by solving the Bogoliubov-de Gennes equations. We found that the vortex charge is negative when a sufficient strength of AF order is induced inside the vortex core; otherwise, it is positive. By tuning the on-site Coulomb repulsion U or the doping param...
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ژورنال
عنوان ژورنال: Journal of Low Temperature Physics
سال: 2004
ISSN: 0022-2291
DOI: 10.1023/b:jolt.0000044238.22175.2d