Abstract
The conducting interface formed between LaAlO3 and SrTiO3 exhibits high electron mobility, tunable carrier densities, and is theoretically predicted to have long spin lifetimes. Thus, the LaAlO3/SrTiO3 heterostructure is a promising system for the transportation of spin information. We have investigated spin-dependent transport across Co/LaAlO3/SrTiO3 heterostructures using an all electrical three terminal geometry and observed Lorentzian magnetoresistance typically associated with Hanle spin dephasing. However, such a picture fails to explain all the experimentally observed behavior. Further, experiments with spin-unpolarized Au/LaAlO3/SrTiO3 heterojunctions support an alternative scenario involving current modulation by spin-dependent transport through defect states in the LaAlO3 barrier.
Original language | English |
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Article number | 032406 |
Number of pages | 4 |
Journal | Applied Physics Letters |
Volume | 105 |
Issue number | 3 |
Early online date | 23 Jul 2014 |
DOIs | |
Publication status | Published - Jul 2014 |
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Dr Chris Bell
- School of Physics - Associate Professor
- Science Faculty Office - Academic Director of Recruitment and Admissions
Person: Academic