D. Eliyahu et al., MESOSCOPIC PERSISTENT-CURRENT CORRELATIONS IN THE PRESENCE OF STRONG MAGNETIC-FIELDS, Physical review. B, Condensed matter, 49(20), 1994, pp. 14448-14455
The effect of a strong magnetic field on the persistent current and cu
rrent-current correlations in the Laughlin geometry are discussed. Due
to the violation of time-reversal symmetry a single disordered sample
may carry a current even in the absence of a threading flux. Once one
averages over many realizations this current disappears. A theory is
presented for the current-current correlations in the presence of a st
rong magnetic field and compared to the results of a numerical calcula
tion. The results fit for the bulk states while discrepancies appear f
or edge states.