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2023-01-16T04:07:32Z
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Spin-Filter Tunnel Junction with Matched Fermi Surfaces
Harada, T.
54597
Ohkubo, I.
54598
Lippmaa, M.
54599
Sakurai, Y.
54600
Matsumoto, Y.
54601
Muto, S.
54602
Koinuma, H.
54603
Oshima, M.
54604
Efficient injection of spin-polarized current into a semiconductor is a basic prerequisite for building semiconductor-based spintronic devices. Here, we use inelastic electron tunneling spectroscopy to show that the efficiency of spin-filter-type spin injectors is limited by spin scattering of the tunneling electrons. By matching the Fermi-surface shapes of the current injection source and target electrode material, spin injection efficiency can be significantly increased in epitaxial ferromagnetic insulator tunnel junctions. Our results demonstrate that not only structural but also Fermi-surface matching is important to suppress scattering processes in spintronic devices.
journal article
American Physical Society
2012-08
application/pdf
Physical Review Letters
109
076602
076602
http://dx.doi.org/10.1103/PhysRevLett.109.076602
http://hdl.handle.net/2237/20828
0031-9007
https://nagoya.repo.nii.ac.jp/record/18732/files/PhysRevLett_109_076602.pdf
eng
https://doi.org/10.1103/PhysRevLett.109.076602
©2012 American Physical Society