We present recent results on the magnetic field dependence of currentvoltage characteristics (CVC) for an artificially prepared two-dimensional array of unshunted NbAlOxNb Josephson junctions. The results obtained from the measured CVC and critical current IC(T,H) differential magnetoresistance (DMR) R(T,H)=[dVdI]I=IC(T,H) of the array are found to exhibit behavior compatible with field induced KosterlitzThouless transition describing unbinding of vortexantivortex pairs under applied magnetic field. © 2011 Elsevier Ltd. All rights reserved.
Sergeenkov, S., Rivera, V. A. G., Marega, E., & Araujo-Moreira, F. M. (2011). Field induced KosterlitzThouless transition in two-dimensional array of Nb- AlO<inf>x</inf>-Nb Josephson junctions. Solid State Communications, 892-894. https://doi.org/10.1016/j.ssc.2011.03.033