R. G. Herb Condensed Matter Seminars |
Events During the Week of November 10th through November 16th, 2013
Monday, November 11th, 2013
- No events scheduled
Tuesday, November 12th, 2013
- No events scheduled
Wednesday, November 13th, 2013
- No events scheduled
Thursday, November 14th, 2013
- Universal Features of Counting Statistics of Phase Slips in Superconducting Nanocircuits
- Time: 10:00 am
- Place: Chamberlin 5310
- Speaker: Alex Levchenko, Michigan State University
- Abstract: I will present a systematic study of the statistical properties of switching current distributions deduced from the measurements of phase-slip-induced switching events on different types of superconducting weak links. I will discuss three types of devices in which a weak link is formed either by a superconducting nanowire, a graphene flake subject to proximity effect, or a quantum dot. We demonstrate that independently of the nature of the weak link, higher moments of the distribution take universal values. In particular, the third moment (skewness) of the distribution is close to -1 both in thermal and quantum regimes. The fourth moment (kurtosis) also takes a universal value close to 5. The experimentally discovered universality of the cummulants is confirmed by an analytical model.
- Host: Maxim Vavilov
Friday, November 15th, 2013
- No events scheduled