YBa2C3O7-delta artificial grain boundary Josephson junctions have been fabricated by a recently implemented biepitaxial technique, employing MgO and CeO2 as seed layers. The Josephson properties of asymmetric grain boundaries (GBs) characterised by a misalignment of the c-axis (45degrees c-axis tilt or twist) are presented. A comparison with GBs characterised by 45degrees c-axis tilt or twist and by an additional rotation of 45degrees of the a-b planes of one electrode has been also performed. The differences observed in the transport properties have been interpreted in terms Of d(x2-y2) wave symmetry of the order parameter and faceting of the grain boundary. (C) 2002 Elsevier Science B.V. All rights reserved.
Influence of the structural anisotropy and of the order parameter symmetry on the transport properties of YBa2Cu3O7-delta grain boundaries Josephson junctions
Tafuri F;di Uccio;Sarnelli;
2002
Abstract
YBa2C3O7-delta artificial grain boundary Josephson junctions have been fabricated by a recently implemented biepitaxial technique, employing MgO and CeO2 as seed layers. The Josephson properties of asymmetric grain boundaries (GBs) characterised by a misalignment of the c-axis (45degrees c-axis tilt or twist) are presented. A comparison with GBs characterised by 45degrees c-axis tilt or twist and by an additional rotation of 45degrees of the a-b planes of one electrode has been also performed. The differences observed in the transport properties have been interpreted in terms Of d(x2-y2) wave symmetry of the order parameter and faceting of the grain boundary. (C) 2002 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
