Quantized conductance in an atom-size bridge made from magnetic materials
With the aid of the Hubbard model, and considering orbital degeneracies, we investigate how the magnetic properties of atom-size bridges affect the quantum transport of electrons through them. Within the Hartree–Fock approximation, we calculate the corresponding total energy of the electron system o...
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Veröffentlicht in: | Journal of applied physics 2000-09, Vol.88 (5), p.2682-2686 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | With the aid of the Hubbard model, and considering orbital degeneracies, we investigate how the magnetic properties of atom-size bridges affect the quantum transport of electrons through them. Within the Hartree–Fock approximation, we calculate the corresponding total energy of the electron system of the atom-size bridge as it is stretched in length. Our numerical results show that stretching the atom-size bridge induces changes in its magnetic state, from paramagnetic to ferromagnetic, and also vice versa. Furthermore, the corresponding conductance variation of the atom-size bridge is demonstrated. |
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ISSN: | 0021-8979 1089-7550 |
DOI: | 10.1063/1.1287780 |