Effects of correlations and disorder on the persistent current in mesoscopic metallic rings
We study the influence of e-e interactions on persistent currents in mesoscopic metallic rings by means of a Hamiltonian which incorporates diagonal disorder (substitional impurities) and where correlations are included up to 2nd order perturbation theory. The results are depending on the degree of...
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| Autores principales: | , , |
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| Formato: | JOUR |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03650375_v84_n3_p227_Chiappe |
| Aporte de: |
| Sumario: | We study the influence of e-e interactions on persistent currents in mesoscopic metallic rings by means of a Hamiltonian which incorporates diagonal disorder (substitional impurities) and where correlations are included up to 2nd order perturbation theory. The results are depending on the degree of disorder. If the disorder introduced by the impurities is not very strong, e-e interactions increase the current up to near its value for a clean metal. Averaging over ring lengths eliminates the first Fourier component of the current and reduces its amplitude, which remains low after interactions are included. |
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