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
Hauptverfasser: Morigaki, Y., Nakanishi, H., Kasai, H., Okiji, A.
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container_title Journal of applied physics
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creator Morigaki, Y.
Nakanishi, H.
Kasai, H.
Okiji, A.
description 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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title Quantized conductance in an atom-size bridge made from magnetic materials
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