Recovery of the persistent current induced by the electron-electron interaction in mesoscopic metallic rings

Дата и время публикации : 1996-03-25T11:29:04Z

Авторы публикации и институты :
G. Chiappe (Departamento de F{‘ı}sica, Universidad de Buenos Aires, Pabellón {I}, Buenos Aires, Argentina)
J. A. Vergés (Departamento de F{‘ı}sica Aplicada, Universidad de Alicante, Alicante, Spain)
E. Louis (Departamento de F{‘ı}sica Aplicada, Universidad de Alicante, Alicante, Spain)

Ссылка на журнал-издание: Solid State Commun. 99, 717 (1996)
Коментарии к cтатье: uuencoded gzipped tar file containing the manuscript (tex file) and four figures (postscript files). Accepted for publication in Solid State Communications. Send e-mail to: jav@boston.icmm.csic.es
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: Persistent currents in mesoscopic metallic rings induced by static magnetic fields are investigated by means of a Hamiltonian which incorporates diagonal disorder and the electron-electron interaction through a Hubbard term ($U$). Correlations are included up to second order perturbation theory which is shown to work accurately for $U$ of the order of the hopping integral. If disorder is not very strong, 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 value, which remains low after interactions are included.

Category: Physics