| Description: | [DPS Seminar] Dr. PRATAP RAYCHAUDHURI (TATA INSTITUTE OF FUNDAMENTAL RESEARCH, MUMBAI) -- BEREZINSKI-KOSTERLITZ-THOULESS TRANSITION IN THIN SUPERCONDUCTING FILMS |
| Date: | Monday, Mar 20, 2017 |
| Time: | noon - 1 p.m. |
| Venue: | G05, Lecture Hall Complex |
| Details: | This year's Nobel Prize was shared by David Thouless and Michael Kosterlitz and Duncan Haldane for their seminal work on topological phase transition and topological phases of matter. One of the pioneering work listed in the Nobel citation is the Kosterlitz-Thouless transition, or more precisely the Berezinski-Kosterlitz-Thouless (BKT) transition (independently also predicted by Vadim Berezinski): A new class of phase transitions predicted in 2-dimensional systems that does not break any continuous symmetry. Physical realization of BKT transition has since been obtained in superfluids, superconductors, Bose-Einstein condensates of cold atoms and 2-D single crystals. In this talk, I will start with a historical overview of the seminal work of BKT and then describe our own experiments on the realization and detection of BKT transition in thin superconducting films. Along the way I will also take you through a simple yet powerful toy, the two-coil mutual inductance setup that allowed us to measure the superfluid density and its temperature dependence in thin superconducting films. |
| Calendar: | Seminar Calendar (entered by devojyoti.adak) |