Hartree-Fock Simulation of Persistent Current in Rings with Single Scatterer
R. Németh and M. Moško
Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
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Received: 4 06 2005;
Using the self-consistent Hartree-Fock approximation for spinless electrons at zero temperature, we calculate the persistent current of the interacting electron gas in a one-dimensional ring containing a singleδ barrier. Our results agree with correlated models like the Luttinger liquid model and lattice model with nearest-neighbor interaction. The persistent current is a sine-like function of magnetic flux. It decays with the ring length (L) faster than L-1 and eventually like L-α-1, where α>0 is universal.
DOI: 10.12693/APhysPolA.108.795
PACS numbers: 73.23.-b, 73.61.Ey