2022/09/12 by Jha, Neha, Paryar, Anand, Parvini, Tahereh Sadat +8
#FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci)
paper · doi:10.48550/arxiv.2209.05073
Delocalized carbon-based radical species with unpaired spin, such as phenalenyl (PLY) radical, opened avenues for developing multifunctional organic spintronic devices. Here we develop a novel technique based on a three-dimensional shadow mask and the in-situ deposition to fabricate PLY-, Cu-PLY-, and Zn-PLY-based organic magnetic tunnel junctions (OMTJs) with area 3x8 μm2 and improved morphology. The nonlinear and weakly temperature-dependent current-voltage (I-V) characteristics in combination with the low organic barrier height suggest tunneling as the dominant transport mechanism in the structurally and dimensionally optimized OMTJs. Cu-PLY-based OMTJs, show a significant magnetoresistance up to 14 percent at room temperature due to the formation of hybrid states at the metal-molecule interfaces called spinterface, which reveals the importance of spin-dependent interfacial modification in OMTJs design. In particular, Cu-PLY OMTJs shows a stable voltage-driven resistive switching response that suggests their use as a new viable and scalable platform for building molecular scale quantum memristors and processors.