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Tunnel Barrier to Spin Filter: Electronic Transport Characteristics of Transition Metal Atom Encapsulated in Smallest Cadmium Telluride Cage

We report first principles theory-based comparative electronic transport studies performed for an atomic chain of Au, bare Cd9Te9 cage-like cluster and single transition metal (TM) (Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ru, Rh, Pd) atom encapsulated within the Cd9Te9 using Au(111) as electrodes. The bare cluster is semiconducting and acts as a tunnel barrier up to a particular applied bias and beyond that, the device has a linear current-voltage relationship. Several TM (Ti, V, Cr, Mn, Fe) encapsulated in the cage show half-metallic behavior and spin filtering effect in the I-V characteristics of the device. A detailed qualitative and quantitative analysis of I-V characteristics for metallic, semiconducting, and half-metallic nanostructures has been carried out.

preprint2022arXivOpen access

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