Long range phase coherencein double barrier magnetic tunnel junctions with large thick metallic quantum well
Abstract
Double barrier heterostructures are model systems for the study of electron tunneling and discrete energy levels in a quantum well (QW). Until now resonant tunneling phenomena in metallicQW have been observed for limited thicknesses (1-2 nm) under which electron phase coherence is conserved. In the present study we show evidence of QW resonance states in Fe QW up to12 nmthick and at room temperature in fully epitaxial doubleMgAlOxbarrier magnetic tunnel junctions. The electron phase coherence displayed in this QWis of unprecedented quality because ofa homogenous interface phase shift due to the small lattice mismatch at the Fe/MgAlOx interface. The physical understanding of the critical role of interface strain on QW phase coherence will greatly promote the development of the spin-dependent quantum resonant tunneling applications.
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Cite
@article{arxiv.1604.00910,
title = {Long range phase coherencein double barrier magnetic tunnel junctions with large thick metallic quantum well},
author = {B. S. Tao and H. X. Yang and Y. L. Zuo and X. Devaux and G. Lengaigne and M. Hehn and D. Lacour and S. Andrieu and M. Chshiev and T. Hauet and F. Montaigne and S. Mangin and X. F. Han and Y. Lu},
journal= {arXiv preprint arXiv:1604.00910},
year = {2016}
}
Comments
16 pages, 3 figures 1 table