Transport across a carbon nanotube quantum dot contacted with ferromagnetic leads: Experiment and nonperturbative modeling
| Autor: | Andreas K. Hüttel, Christoph Strunk, Andreas Prüfling, Alois Dirnaichner, D. Steininger, Milena Grifoni |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Condensed matter physics Magnetoresistance Condensed Matter - Mesoscale and Nanoscale Physics ddc:530 FOS: Physical sciences Conductance Coulomb blockade Charge (physics) Carbon nanotube Condensed Matter Physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 530 Physik Electronic Optical and Magnetic Materials law.invention Carbon nanotube quantum dot Condensed Matter::Materials Science Ferromagnetism law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Quantum tunnelling |
| DOI: | 10.5283/epub.31826 |
| Popis: | We present measurements of tunneling magneto-resistance (TMR) in single-wall carbon nanotubes attached to ferromagnetic contacts in the Coulomb blockade regime. Strong variations of the TMR with gate voltage over a range of four conductance resonances, including a peculiar double-dip signature, are observed. The data is compared to calculations in the "dressed second order" (DSO) framework. In this non-perturbative theory, conductance peak positions and linewidths are affected by charge fluctuations incorporating the properties of the carbon nanotube quantum dot and the ferromagnetic leads. The theory is able to qualitatively reproduce the experimental data. 14 pages, 13 figures |
| Databáze: | OpenAIRE |
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