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 MgAlOx barrier magnetic tunnel junctions. The electron phase coherence displayed in this QWis of unprecedented quality because of a 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 spin-dependent quantum resonant tunneling applications.
Complete list of metadatas

Cited literature [37 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01284017
Contributor : Ijl Ul <>
Submitted on : Wednesday, July 13, 2016 - 11:44:05 AM
Last modification on : Tuesday, December 3, 2019 - 10:22:10 AM

File

Yuan_PRL2015.pdf
Publisher files allowed on an open archive

Identifiers

Citation

B. S. Tao, H. X. Yang, Y. L. Zuo, Xavier Devaux, Gwladys Lengaigne, et al.. Long-Range Phase Coherence in Double-Barrier Magnetic Tunnel Junctions with a Large Thick Metallic Quantum Well. Physical Review Letters, American Physical Society, 2015, 115 (15), pp.157204. ⟨10.1103/PhysRevLett.115.157204⟩. ⟨hal-01284017⟩

Share

Metrics

Record views

477

Files downloads

178