THZ Control of Superconductivity
Event details
| Date | 13.12.2010 |
| Hour | 16:15 |
| Speaker | Prof. Andrea Cavalleri |
| Location | |
| Category | Conferences - Seminars |
One of the most intriguing features of some high-temperature cuprate superconductors is the competition between spin- and charge-order, akin to a Wigner crystal, and superconductivity. Both effects appear in different regions of the phase diagram and the transition between these two states is often believed to contain important hints about the mistery of High-Tc superconductivity. We use mid-infrared femtosecond pulses to transform one such stripe-ordered compound, La1.675Eu0.2Sr0.125CuO4, into a transient three-dimensional superconductor. The emergence of coherent interlayer transport is evidenced by the prompt appearance of a Josephson plasma resonance in the c-axis optical properties. An upper limit for the timescale needed to form the superconducting phase is estimated to be 1-2 ps, significantly faster than expected.
Practical information
- General public
- Free