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

Abstract

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.

3 pages, 3 figures

References in corpus (2)

• Very low 1/f noise at room temperature in fully epitaxial Fe/MgO/Fe magnetic tunnel junctions
• Sub-Poissonian shot noise in CoFeB/MgO/CoFeB-based magnetic tunneling junctions

Cited by in corpus (4)

• Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
• Shot noise in magnetic tunnel junctions from first principles
• Observation of finite excess noise in the voltage-biased quantum Hall regime as a precursor for breakdown
• What Can We Learn from Noise? -- Mesoscopic Nonequilibrium Statistical Physics --