Coherent Magnetotransport Through an Artificial Molecule

Details Coherent Magnetotransport Through an Artificial Molecule Coherent Magnetotransport Through an Artificial Molecule

1995-05-12

arxiv.org/abs/cond-mat/9505058v3

Phys. Lett. A 230, 73 (1997)

Physics

Condensed Matter

4 pages, REVTEX 3.0, 5 figures included as postscript files

Scientific paper

10.1016/S0375-9601(97)00234-X

The conductance in an extended multiband Hubbard model describing linear arrays of up to ten quantum dots is calculated via a Lanczos technique. A pronounced suppression of certain resonant conductance peaks in an applied magnetic field due to a density-dependent spin-polarization transition is predicted to be a clear signature of a coherent ``molecular'' wavefunction in the array. A many-body enhancement of localization is predicted to give rise to a {\em giant magnetoconductance} effect in systems with magnetic scattering.

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