THE INFLUENCE OF THE CAPACITY UPON THE PERSISTENT CURRENT IN A ONE-DIMENSIONAL BALLISTIC RING

In the present paper within a phenomenological approach a simple expre ssion for the persistent current in a one-dimensional ballistic ring i s proposed in view of a geometrical capacity C between a ring and an e lectron reservoir. It is shown that the current averaged within the gr and-canonical ensemble is other than zero and is proportional to C-1 a t a large magnitude of the capacity. (C) 1998 Elsevier Science B.V. Al l rights reserved.