Signature of Coherent Transport in Epitaxial Spinel-based Magnetic Tunnel Junctions Probed by Shot Noise Measurement

Daichi Chiba; Hiroaki Sukegawa; Kensaku Chida; Kensuke Kobayashi; Seiji Mitani; Shinya Kasai; Takahiro Tanaka; Teruo Ono; Tomonori Arakawa; Yoshitaka Nishihara

arxiv: 1205.7007 · v1 · pith:DYF3PNKGnew · submitted 2012-05-31 · ❄️ cond-mat.mes-hall · quant-ph

Signature of Coherent Transport in Epitaxial Spinel-based Magnetic Tunnel Junctions Probed by Shot Noise Measurement

Takahiro Tanaka , Tomonori Arakawa , Kensaku Chida , Yoshitaka Nishihara , Daichi Chiba , Kensuke Kobayashi , Teruo Ono , Hiroaki Sukegawa

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Shinya Kasai Seiji Mitani

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classification ❄️ cond-mat.mes-hall quant-ph

keywords tunnelingconfigurationnoiseshotcoherentepitaxialjunctionsmagnetic

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We measured the shot noise in fully epitaxial Fe/MgAl2OX/Fe-based magnetic tunneling junctions (MTJs). While the Fano factor to characterize the shot noise is very close to unity in the antiparallel configuration, it is reduced to 0.98 in the parallel configuration. This observation shows the sub-Poissonian process of electron tunneling in the parallel configuration, indicating the coherent tunneling through the spinel-based tunneling barrier of the MTJ.

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Signature of Coherent Transport in Epitaxial Spinel-based Magnetic Tunnel Junctions Probed by Shot Noise Measurement

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