Seminar to be held on Tues. at SISSA

[Cond.Matt. & Stat.Mech.Section]

 JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR

 


Tuesday, 3 December   -   11:00 a.m.

 

 

SISSA, Santorio Building,  Room 5 (Ground floor)


 

Francesco MANCARELLA    ( NORDITA, Stockholm )

 


" Angular momentum blockade in   nanoscale high-Tc superconducting grains "

 

Abstract



The arise of an angular momentum blockade in small d-wave superconducting grains embedded in external magnetic field is envisaged. It's shown how abrupt changes in the angular momentum state of the condensate ("angular momentum blockade") occur as a result of variation of the external field. The effect represents a direct analogy with the Coulomb blockade. A Ginzburg–Landau description is adopted to illustrate how a magnetic field induces a deviation from the d-wave symmetry, which is described by a (d_{x2−y2} + id{xy})-order parameter. The volume magnetic susceptibility will be described as a function of the magnetic field, and corresponding magnetization jumps, that should be experimentally observable in superconducting grains, are predicted to occur near equispaced critical values of the field.