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Title: First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions

Abstract

Quantum well (QW) resonances in Fe(001)/MgO/Fe/MgO/Fe double barrier magnetic tunnel junctions are calculated from the first-principles. By including the Coulomb blockade energy due to the finite size islands of the Fe middle layer, we confirm that the oscillatory differential resistance observed in a recent experiment, T. Nozaki et al, Phys. Rev. Lett. {\bf 96}, 027208 (2006), originates from the QW resonances from the $$\Delta_1$$ band of the Fe majority spin channel. The primary source of smearing at low temperatures is shown to be the variation of the Coulomb blockade energy.

Authors:
 [1];  [2];  [3];  [1]
  1. Institute of Physics, Chinese Academy of Science
  2. Institute of Theoretical Physics, Chinese Academy of Science
  3. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Center for Nanophase Materials Sciences
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
978185
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 97; Journal Issue: 8
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; QUANTUM WELLS; RESONANCE; SPIN

Citation Formats

Wang, Y., Lu, Zhong-Yi, Zhang, Xiaoguang, and Han, Prof. X. F.. First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.97.087210.
Wang, Y., Lu, Zhong-Yi, Zhang, Xiaoguang, & Han, Prof. X. F.. First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions. United States. doi:10.1103/PhysRevLett.97.087210.
Wang, Y., Lu, Zhong-Yi, Zhang, Xiaoguang, and Han, Prof. X. F.. Sun . "First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions". United States. doi:10.1103/PhysRevLett.97.087210.
@article{osti_978185,
title = {First-principles theory of quantum well resonance in double barrier magnetic tunnel junctions},
author = {Wang, Y. and Lu, Zhong-Yi and Zhang, Xiaoguang and Han, Prof. X. F.},
abstractNote = {Quantum well (QW) resonances in Fe(001)/MgO/Fe/MgO/Fe double barrier magnetic tunnel junctions are calculated from the first-principles. By including the Coulomb blockade energy due to the finite size islands of the Fe middle layer, we confirm that the oscillatory differential resistance observed in a recent experiment, T. Nozaki et al, Phys. Rev. Lett. {\bf 96}, 027208 (2006), originates from the QW resonances from the $\Delta_1$ band of the Fe majority spin channel. The primary source of smearing at low temperatures is shown to be the variation of the Coulomb blockade energy.},
doi = {10.1103/PhysRevLett.97.087210},
journal = {Physical Review Letters},
number = 8,
volume = 97,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}
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