Conductance of an Artificial Atom in Strong Magnetic Fields

Details Conductance of an Artificial Atom in Strong Magnetic Fields Conductance of an Artificial Atom in Strong Magnetic Fields

1994-07-06

arxiv.org/abs/cond-mat/9407035v1

Physics

Condensed Matter

10 pages-RevTeX, 4 Figs. available u. request; MIT-Kastner-SET/9407

Scientific paper

The conductance resulting from resonant tunneling through a droplet of $N \sim 30$ electrons is used to measure its chemical potential $\mu_N$. Abrupt shifts of $\mu_N$ occur at sharply defined values of the magnetic field, at which the state of the droplet changes. These are used to study part of the phase-diagram of the droplet in strong magnetic fields; we find evidence for a new phase in the spin polarized regime. We make a detailed comparison between theory and experiment: Hartree-Fock provides a quantitative description of the measurements when both spin-split states of the lowest orbital Landau level are occupied and a qualitative one in the spin polarized regime.

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