Unité Mixte de Physique CNRS/Thales, 1 Avenue Augustin Fresnel, Campus de l'Ecole Polytechnique, 91767 Palaiseau and Université Paris Sud 11, 91405 Orsay, France.
Phys Rev Lett. 2011 Dec 9;107(24):247002. doi: 10.1103/PhysRevLett.107.247002.
Using heterostructures that combine a large-polarization ferroelectric (BiFeO3) and a high-temperature superconductor (YBa2Cu3O(7-δ)), we demonstrate the modulation of the superconducting condensate at the nanoscale via ferroelectric field effects. Through this mechanism, a nanoscale pattern of normal regions that mimics the ferroelectric domain structure can be created in the superconductor. This yields an energy landscape for magnetic flux quanta and, in turn, couples the local ferroelectric polarization to the local magnetic induction. We show that this form of magnetoelectric coupling, together with the possibility to reversibly design the ferroelectric domain structure, allows the electrostatic manipulation of magnetic flux quanta.
利用结合了大极化铁电体（BiFeO3）和高温超导体（YBa2Cu3O(7-δ)）的异质结构，我们通过铁电场效应证明了超导凝聚态在纳米尺度上的调制。通过这种机制，可以在超导体中创建出模仿铁电畴结构的纳米级正常区域图案。这为磁通量量子提供了能量景观，并反过来将局部铁电极化与局部磁感应耦合。我们表明，这种形式的磁电耦合，以及可逆设计铁电畴结构的可能性，允许对磁通量进行静电操纵。
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