From the Fermi glass towards the Mott insulator in one dimension: Delocalization and strongly enhanced persistent currents

Details From the Fermi glass towards the Mott insulator in one dimension: Delocalization and strongly enhanced persistent currents From the Fermi glass towards the Mott insulator in one dimension: Delocalization and strongly enhanced persistent currents

1998-04-06

arxiv.org/abs/cond-mat/9804053v1

Phys. Rev. Lett. 81, 2308 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures; RevTeX

Scientific paper

10.1103/PhysRevLett.81.2308

When a system of spinless fermions in a disordered mesoscopic ring becomes instable between the inhomogeneous configuration driven by the random potential (Anderson insulator) and the homogeneous one driven by repulsive interactions (Mott insulator), the persistent current can be enhanced by orders of magnitude. This is illustrated by a study of the change of the ground state energy under twisted boundary conditions using the density matrix renormalization group algorithm.

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