Physics: Prof. dr. H. Hilgenkamp: Experiments with fractional magnetic flux quanta
|19 April 2007||FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen|
|Speaker:||Physics: Prof. dr. H. Hilgenkamp|
|Affiliation:||University of Twente - TNW|
|Title:||Experiments with fractional magnetic flux quanta|
An intriguing effect occurs when high-T c and low-T c superconductors are connected with each other in certain geometries. Due to the difference in the symmetry properties of the superconducting states in these materials ( ‘d-wave’ versus ‘s-wave’ symmetry) a spontaneous current starts to flow. This current produces a magnetic flux equal to half of the well know flux-quantum Φ0 = h/2e.
We use this half-flux quantum effect in hybrid high-T c / low-T c structures for basic studies on the high-T c cuprate superconductors  (see figure), as well as for the development of novel electronic devices . In this colloquium I will introduce various experiments in both directions.
: Kirtley et al., Nature Physics 2, 190 (2006).
: Ortlepp et al., Science 312, 1495 (2006).
|Last modified:||12 September 2014 11.22 a.m.|