2014/07/22 by Varada V Bal, Bal, Varada V, Manan M Mehta +11
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Superconductivity (cond-mat.supr-con) #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.1407.5939
5 pages, 3 figures. Submitted to the 27th International Conference on Low-Temperature Physics
arxiv created 2014/07/22 · arxiv updated 2014/07/23
We demonstrate top-gate tunable Josephson junction like behavior in the two dimensional electron gas at the LaAlO3-SrTiO3 interface. A combination of global back-gating and local top-gating is used to define the junctions, providing an efficient way for much finer spatial control over the properties of the interface, as compared to back-gating alone. The variation of critical currents and zero bias resistances with temperature shows that the junctions behave like short, overdamped weak links. This technique could be an important tool to illuminate the nature of superconductivity in the LaAlO3-SrTiO3 interface system.