| Autor: |
Nossa, J. F., Islam, M. Fhokrul, Canali, C. M., Pederson, M. R. |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Physical Review B 88, 224423 (2013) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.88.224423 |
| Popis: |
Using first-principles methods we study theoretically the properties of an individual $\{Fe_4\}$ single-molecule magnet (SMM) attached to metallic leads in a single-electron transistor geometry. We show that the conductive leads do not affect the spin ordering and magnetic anisotropy of the neutral SMM. On the other hand, the leads have a strong effect on the anisotropy of the charged states of the molecule, which are probed in Coulomb blockade transport. Furthermore, we demonstrate that an external electric potential, modeling a gate electrode, can be used to manipulate the magnetic properties of the system. For a charged molecule, by localizing the extra charge with the gate voltage closer to the magnetic core, the anisotropy magnitude and spin ordering converges to the values found for the isolated $\{Fe_4\}$ SMM. We compare these findings with the results of recent quantum transport experiments in three-terminal devices. |
| Databáze: |
arXiv |
| Externí odkaz: |
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