Re-entrant pinning of Wigner molecules in a magnetic field due to a Coulomb impurity

Details Re-entrant pinning of Wigner molecules in a magnetic field due to a Coulomb impurity Re-entrant pinning of Wigner molecules in a magnetic field due to a Coulomb impurity

2004-05-05

arxiv.org/abs/cond-mat/0405081v1

Europhys. Lett. 66 (2004) 701-707

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1209/epl/i2003-10250-8

Pinning of magnetic-field induced Wigner molecules (WMs) confined in parabolic two-dimensional quantum dots by a charged defect is studied by an exact diagonalization approach. We found a re-entrant pinning of the WMs as function of the magnetic field, a magnetic field induced re-orientation of the WMs and a qualitatively different pinning behaviour in the presence of a positive and negative Coulomb impurity.

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