Atomic scale 0-pi transition in a high-T-c superconductor/ferromagnetic-insulator/high-T-c superconductor Josephson junction

作者：Kawabata Shiro^*; Tanaka Yukio; Asano Yasuhiro

来源：Physica E: Low-Dimensional Systems and Nanostructures , 2011, 43(3): 722-725.

DOI：10.1016/j.physe.2010.07.038

We study the Josephson transport in a high-T-c superconductor/ferromagnetic-insulator(FI)/high-T-c superconductor numerically. We found the formation of a pi-junction in such systems. More remarkably the ground state of such junction alternates between 0- and pi-states when thickness of FI is increasing by a single atomic layer. We propose an experimental setup for observing the atomic scale 0-pi transition. Such FI-based pi-junctions can be used to implement highly coherent quantum bits.

• 出版日期2011-1