תאריך:
ג', 20/05/201412:00-13:30
תאריך:
ג', 20/05/2014 12:00 עד 13:30
מיקום:
Danciger B building, Seminar room
'The Role of the Core Energy in the Vortex Nernst Effect':
We present an analytical study of diamagnetism and transport in a film with superconducting phase fluctuations, formulated in terms of vortex dynamics within the Debye-Hückle approximation. We find that the diamagnetic and Nernst signals decay strongly with temperature in a manner which is dictated by the vortex core energy. Furthermore, we use the theory to interpret measurements of underdoped La2-xSrxCuO4 above the critical temperature regime and obtain a considerably better fit to the data than a fit based on Gaussian order-parameter fluctuations. Our results indicate that the core energy in this system scales roughly with the critical temperature. This we describe within a model of competing fluctuating orders
ג', 20/05/2014 12:00 עד 13:30
מיקום:
Danciger B building, Seminar room
'The Role of the Core Energy in the Vortex Nernst Effect':
We present an analytical study of diamagnetism and transport in a film with superconducting phase fluctuations, formulated in terms of vortex dynamics within the Debye-Hückle approximation. We find that the diamagnetic and Nernst signals decay strongly with temperature in a manner which is dictated by the vortex core energy. Furthermore, we use the theory to interpret measurements of underdoped La2-xSrxCuO4 above the critical temperature regime and obtain a considerably better fit to the data than a fit based on Gaussian order-parameter fluctuations. Our results indicate that the core energy in this system scales roughly with the critical temperature. This we describe within a model of competing fluctuating orders