Fano versus Kondo Resonances in a Closed Aharonov–Bohm Interferometer Coupled to Ferromagnetic Electrodes
| Autor: | WU Shao-Quan, Sun Wei-Li |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Magnetoresistance Spintronics Condensed matter physics Spin valve General Physics and Astronomy Conductance Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Magnetic flux Condensed Matter::Materials Science Interferometry Ferromagnetism Quantum mechanics Condensed Matter::Strongly Correlated Electrons Quantum tunnelling |
| Zdroj: | Chinese Physics Letters. 24:1054-1057 |
| ISSN: | 1741-3540 0256-307X |
| Popis: | Using the Keldysh nonequilibrium Green function and equation-of-motion technique, we investigate Fano versus Kondo resonances in a closed Aharonov–Bohm interferometer coupled to ferromagnetic leads and study their effects on the conductance of this system. The conductance with both parallel and antiparallel lead-polarization alignments is analysed for various values of the magnetic flux. Our results show that this system can provide an excellent spin filtering property, and a large tunnelling magnetoresistance can arise by adjusting the system parameters, which indicates that this system is a possible candidate for spin valve transistors and has important applications in spintronics. |
| Databáze: | OpenAIRE |
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