Coherent Magnetotransport Through an Artificial Molecule

Abstract

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.

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

References in corpus (6)

• The Anderson Model out of Equilibrium: Non-Crossing-Approximation Approach to Transport through a Quantum Dot
• Collective Transport in Arrays of Quantum Dots
• Electron correlation resonances in the transport through a single quantum level
• Relation between Barrier Conductance and Coulomb Blockade Peak Splitting for Tunnel-Coupled Quantum Dots
• TUNNELING SPECTROSCOPY OF QUANTUM CHARGE FLUCTUATIONS IN THE COULOMB BLOCKADE
• Unusual low-temperature thermopower in the one-dimensional Hubbard model

Cited by in corpus (5)

• Addition spectrum, persistent current, and spin polarization in coupled quantum dot arrays: coherence, correlation, and disorder
• Coherent Resonant Tunneling Through an Artificial Molecule
• Ab Initio Exact Diagonalization Simulation of the Nagaoka Transition in Quantum Dots
• Correlated charge polarization in a chain of coupled quantum dots
• Inducement of Spin-pairing and Correlated Semi-metallic State in Mott-Hubbard Quantum Dot Array