We review and extend a previous study(1) on the symmetry of the superconducting state, stimulated by recent tunneling and Andreev reflection measurements giving robust evidences for the existence of a d(x2-y2) + id(xy) order parameter in the overdoped regime of two different cuprates. Looking for a possible second-order phase transition from a standard d(x2-y2) to a mixed and time reversal breaking state, we confirm the results of our previous analysis on La2-xSrxCuO4. In the case of Y1-yCayBa2Cu3O7-x as well, among all the allowed symmetries, the d(x2-y2) + id(xy) is the most favored one and the unconventional state is likely to occur in a small dome of the phase diagram located in the optimal-overdoped region and at very low temperatures. RI Capone, Massimo/A-7762-2008
http://hdl.handle.net/20.500.11767/14062
Titolo: | Time reversal breaking superconducting state in the phase diagram of the cuprates |
Autori: | Sangiovanni G; Capone M; Caprara S |
Rivista: | |
Data di pubblicazione: | 2003 |
Volume: | 17 |
Fascicolo: | 4-6 |
Pagina iniziale: | 614 |
Pagina finale: | 620 |
Digital Object Identifier (DOI): | 10.1142/S0217979203016327 |
Appare nelle tipologie: | 1.1 Journal article |