Paramagnetic effect in YBa2Cu3O7-x grain-boundary junctions

Article

关键词: TIME-REVERSAL SYMMETRY;    JOSEPHSON-JUNCTIONS;    GROUND-STATE;    MICROSTRUCTURE;    FLUX;   

DOI  :  10.1103/PhysRevB.68.014510

来源: SCIE

【 摘 要 】

A detailed investigation of the magnetic response of YBa2Cu3Ox grain-boundary Josephson junctions has been carried out using both radio-frequency measurements and scanning superconducting quantum interference device microscopy. In a nominally zero-field-cooled regime we observed a paramagnetic response at low external fields for 45degrees asymmetric grain boundaries. We argue that the observed phenomenology results from the d-wave order-parameter symmetry and depends on Andreev bound states.

【 授权许可】

Free