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Conductance of an Artificial Atom in Strong Magnetic Fields

O. Klein·C. de C. Chamon·D. Tang·D. M. Abusch-Magder·X. -G. Wen·M. A. Kastner·S. J. Wind
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Abstract

The conductance resulting from resonant tunneling through a droplet of $N \sim 30$ electrons is used to measure its chemical potential $μ_N$. Abrupt shifts of $μ_N$ 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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O. Klein, C. de C. Chamon, D. Tang, D. M. Abusch-Magder, X. -G. Wen, M. A. Kastner, S. J. Wind. 1994-07-06. Conductance of an Artificial Atom in Strong Magnetic Fields. https://arxiv.org/abs/cond-mat/9407035

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