Dynamical superconducting order parameter domains in Sr2RuO4
Dynamical superconducting order parameter domains in Sr2RuO4
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DOI：
10.1126/science.1133239
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发表时间：
2006-11-24
期刊：
影响因子：
56.9
通讯作者：
Maeno, Yoshiteru
中科院分区：
文献类型：
--
作者：
Kidwingira, Francoise;Strand, J. D.;Maeno, Yoshiteru
我们提出了直接的证据，复杂的p波序参量对称性和存在的动力学手征序参量域的形式p（x）+/- ip（y）在Sr 2 RuO 4超导体。畴结构产生的磁场调制的临界电流的约瑟夫森结上制作的Sr 2 RuO 4单晶的正交面的差异。畴的手征态之间的转变或分隔它们的畴壁的运动在临界电流中产生电报噪声，作为磁场或时间的函数，并且负责在临界电流的场扫描中观察到的滞后。这种域的存在证实了p-波三重态自旋和复杂的（打破时间反演对称性）性质的超导配对状态Sr 2 RuO 4。
We present direct evidence for complex p-wave order parameter symmetry and the presence of dynamical chiral order parameter domains of the form p(x) +/- ip(y) in the ruthenate superconductor Sr2RuO4. The domain structure creates differences in the magnetic field modulation of the critical current of Josephson junctions fabricated on orthogonal faces of Sr2RuO4 single crystals. Transitions between the chiral states of a domain or the motion of domain walls separating them generates telegraph noise in the critical current as a function of magnetic field or time and is responsible for hysteresis observed in field sweeps of the critical current. The presence of such domains confirms the p-wave triplet spin and complex ( broken time-reversal symmetry) nature of the superconducting pairing state in Sr2RuO4.