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 |