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Flux line dynamics in unconventional superconductors

English title Flux line dynamics in unconventional superconductors
Applicant Sigrist Manfred
Number 108002
Funding scheme Project funding (Div. I-III)
Research institution Institut für Theoretische Physik ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Theoretical Physics
Start/End 01.06.2006 - 31.05.2008
Approved amount 20'200.00
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Keywords (4)

solid state physics; strongly correlated electron systems; unconventional superconductivity; flux line dynamics

Lay Summary (English)

Lay summary
Superconductors in magnetic fields display highly complex phenomena, because magnetic field penetrates(type-II) superconductors as flux lines, which are vortices of the superfluid condensate. An interesting aspect of this so-called ''vortex matter'' is the dynamics of flux lines which is strongly influenced by the pinning of flux lines, usually, at defects of the material such as impurities and dislocations. The present project is concerned with exotic pinning mechanisms which can occur in certain unconventional superconductors whose condensate have a higher degree of complexity than ordinary superconductors. Some of these superconductors show surprising low flux flow rates seemingly incompatible with other measured properties such as the magnitude of critical supercurrents. High precision measurements of the magnetic flux decay are performed to test theoretical ideas that pinning could also occur on defects produced by the superconducting phase itself, e.g. at domain walls of the unconventional superconducting condensate. In this project experimental evidence for this kind of phenomenology has been observed among heavy fermion, skutterudite and some non-centrosymmetric superconductors.
Direct link to Lay Summary Last update: 21.02.2013

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