Space-charge trap mediated conductance blockade in tunnel junctions with half-metallic electrodes
SCIE
SCOPUS
- Title
- Space-charge trap mediated conductance blockade in tunnel junctions with half-metallic electrodes
- Authors
- Feng, JF; Kim, TH; Han, XF; Zhang, XG; Wang, Y; Zou, J; Yu, DB; Yan, H; Li, AP
- Date Issued
- 2008-11-10
- Publisher
- American Institute of Physics
- Abstract
- A conductance blockade effect has been observed in the magnetic tunnel junction consisting of La0.7Sr0.3MnO3 electrodes and a SrTiO3 barrier. The blockade effect is correlated with the space-charge trap states in the barrier. The blockade threshold eV(B)=128 meV is significantly greater than Coulomb charging energy E-C=11 meV. The blockade can be lifted with a magnetic field, accompanied by a very large magnetoresistance up to 10 000%. The intriging blockade behavior is distinctly different from the conventional Coulomb blockade effect, showing a unique spin-dependent tunneling process mediated by the localized charge trap states.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/9610
- DOI
- 10.1063/1.3025851
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- Applied Physics Letters, vol. 93, no. 19, 2008-11-10
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