title: Long-Range Phase Coherence in Double-Barrier Magnetic Tunnel Junctions with a 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 metallic QWs 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 QWs up to 12 nm thick and at room temperature in fully epitaxial double MgAlO_{x} barrier magnetic tunnel junctions. The electron phase coherence displayed in this QW is of unprecedented quality because of a homogenous interface phase shift due to the small lattice mismatch at the Fe-MgAlO_{x} interface. The physical understanding of the critical role of interface strain on QW phase coherence will greatly promote the development of spin-dependent quantum resonant tunneling applications.
authors.affiliation: Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.|Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: B S
authors.initials: BS
authors.lastname: Tao
authors.affiliation: Univ. Grenoble Alpes, INAC-SPINTEC, F-38000 Grenoble, France; CEA, INAC-SPINTEC, F-38000 Grenoble, France and CNRS, SPINTEC, F-38000 Grenoble, France.
authors.forename: H X
authors.initials: HX
authors.lastname: Yang
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: Y L
authors.initials: YL
authors.lastname: Zuo
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: X
authors.initials: X
authors.lastname: Devaux
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: G
authors.initials: G
authors.lastname: Lengaigne
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: M
authors.initials: M
authors.lastname: Hehn
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: D
authors.initials: D
authors.lastname: Lacour
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: S
authors.initials: S
authors.lastname: Andrieu
authors.affiliation: Univ. Grenoble Alpes, INAC-SPINTEC, F-38000 Grenoble, France; CEA, INAC-SPINTEC, F-38000 Grenoble, France and CNRS, SPINTEC, F-38000 Grenoble, France.
authors.forename: M
authors.initials: M
authors.lastname: Chshiev
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: T
authors.initials: T
authors.lastname: Hauet
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: F
authors.initials: F
authors.lastname: Montaigne
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: S
authors.initials: S
authors.lastname: Mangin
authors.affiliation: Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: X F
authors.initials: XF
authors.lastname: Han
authors.affiliation: Institut Jean Lamour, UMR 7198, CNRS-Université de Lorraine, BP239, 54506 Vandœuvre-lès-Nancy, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Lu