Figure 3: Tunnelling electroresistance of Pt/BaTiO3 (BTO)/Nb:SrTiO3 ferroelectric tunnel junctions with a 4 u.c.-thick BTO barrier as a function of Nb concentration.
(a,b) I–V curves for the ON and the OFF state, respectively. (c) Junction currents and ON/OFF ratios, read at 0.6 V.
