钇钡铜氧（YBa₂Cu₃O₇₋δ）晶界约瑟夫森结中的本征d波效应
Intrinsic d-wave effects in YBa(2)Cu(3)O(7-delta) grain boundary Josephson junctions.
作者信息
Lombardi F, Tafuri F, Ricci F, Miletto Granozio F, Barone A, Testa G, Sarnelli E, Kirtley J R, Tsuei C C
机构信息
INFM-Coherentia, Dipartimento Scienze Fisiche, Università di Napoli Federico II, Naples, Italy.
出版信息
Phys Rev Lett. 2002 Nov 11;89(20):207001. doi: 10.1103/PhysRevLett.89.207001. Epub 2002 Oct 24.
We have measured the angular dependence of the Josephson critical current density (J(C)) in c-axis tilt biepitaxial grain boundary YBa(2)Cu(3)O(7-delta) junctions. We observe for the first time intrinsic d-wave pairing symmetry effects manifested as an oscillatory dependence of J(C) on angle. This intrinsic effect is evident even though spontaneous currents, possibly induced by faceting or barrier impurities, are observed in the grain boundaries.
我们测量了c轴倾斜双外延晶界YBa₂Cu₃O₇₋δ结中约瑟夫森临界电流密度（J(C)）的角度依赖性。我们首次观察到本征d波配对对称效应，表现为J(C)随角度的振荡依赖性。即使在晶界中观察到可能由刻面或势垒杂质诱导的自发电流，这种本征效应仍然明显。
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