Mesoscopic Superconductors and Telegraph Noise
Abstract
Micromachined devices are emerging as novel tools for small sample characterization with very high sensitivities. We have used High-Q mechanical oscillators to study the vortex dynamics in superconductors at low fields. The vortex dynamics of a single superconducting sample can be studied down to the single flux line regime. In the past we have demonstrated the capabilities of this novel tool by providing the first experimental data in support of current theoretical models describing flux lines in 1+1 dimensions. In this talk we will describe the dynamics of a small number of flux lines at fixed fields and temperatures in the traditional superconductor 2H-NbSe_2. Our results show how the flux lines jump back and forth between two different configurations. By introducing small changes in the magnetic field we are able to fine tune the shape of the energy potential and therefore the 'hopping' rates.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2000
- Bibcode:
- 2000APS..MARA12003B