R. G. Herb Condensed Matter Seminars |
Events During the Week of February 2nd through February 9th, 2020
Monday, February 3rd, 2020
- No events scheduled
Tuesday, February 4th, 2020
- No events scheduled
Wednesday, February 5th, 2020
- No events scheduled
Thursday, February 6th, 2020
- Studying superconductors using NV-centers in diamond optical magnetometry
- Time: 10:00 am
- Place: 5310 Chamberlin
- Speaker: Ruslan Prozorov, Iowa State/Ames Lab
- Abstract: The variation of magnetic fields across the superconducting samples is quite small in the fragile genuine Meissner state, which is easily disturbed by Abrikosov vortex pining and field inhomogeneities due to large demagnetization effects. We developed minimally invasive optical magneto-sensing based on the ensembles of NV centers in diamond crystal to study Meissner state structure and to determine the lower critical field. I will show how different the structure of the Meissner state is in different superconducting materials. I will also discuss the application of the NV sensing to identify quantum phase transition in charge-doped iron-based superconductors.
- Host: Alex Levchenko
Friday, February 7th, 2020
- No events scheduled