Abstract
We report measurements on YBa 2Cu 3O 7− δ (YBCO)/PrBa 2Cu 3O 7− δ /YBCO asymmetric ramp-edge Josephson junctions whose ab-plane orientation relatively rotated by 45°. The temperature dependence of the maximum Josephson current I c is in good agreement with the d-wave theory taking the zero energy state into account. We discuss the crystal angle dependence of d-wave Josephson current on microwave irradiation properties and the comparison between several junctions with different crystal angles normal to the interface boundary.
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