1 research outputs found
Enhancing superconductivity: Magnetic impurities and their quenching by magnetic fields
Magnetic fields and magnetic impurities are each known to suppress
superconductivity. However, as the field quenches (i.e. polarizes) the
impurities, rich consequences, including field-enhanced superconductivity, can
emerge when both effects are present. For the case of superconducting wires and
thin films, this field-spin interplay is investigated via the
Eilenberger-Usadel scheme. Non-monotonic dependence of the critical current on
the field (and therefore field-enhanced superconductivity) is found to be
possible, even in parameter regimes in which the critical temperature decreases
monotonically with increasing field. The present work complements that of
Kharitonov and Feigel'man, which predicts non-monotonic behavior of the
critical temperature.Comment: 8 pages, 2 figures, EPL forma