Interplay of Vibration and Coulomb Effects in Transport of Spin-Polarized Electrons in a Single-Molecule Transistor
| Autor: | O. M. Bahrova, I. V. Krive, S. I. Kulinich, A. D. Shkop |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics FOS: Physical sciences Coulomb blockade Conductance 02 engineering and technology Electron 021001 nanoscience & nanotechnology Condensed Matter Physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Magnetic field Quantum dot Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Coulomb General Materials Science Electrical and Electronic Engineering 0210 nano-technology Spin (physics) Quantum tunnelling |
| Popis: | Tunnel transport of interacting spin-polarized electrons through a single-level vibrating quantum dot in external magnetic field is studied. By using density matrix method, the current-voltage characteristics and the dependence of conductance on temperature of a single-electron transistor were calculated. We found that a lifting of Coulomb blockade in external magnetic field happens in stages. The Franck-Condon steps associated with inelastic electron tunneling in our case are doubled due to contribution of two Zeeman-split levels in electron transport. The doubling of steps can be also observed in the presence of Coulomb interaction. For strong electron-vibron interaction the temperature dependence of conductance is shown to be non-monotonic and anomalous growth of conductance maximum weakly depends both on the Coulomb strength and the external magnetic field. 9 pages, 4 figures |
| Databáze: | OpenAIRE |
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