Canted ground state in artificial molecules at high magnetic fields

Details Canted ground state in artificial molecules at high magnetic fields Canted ground state in artificial molecules at high magnetic fields

2000-06-20

arxiv.org/abs/cond-mat/0006294v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.62.R10633

We analyze the transitions that a magnetic field provokes in the ground state of an artificial homonuclear diatomic molecule. For that purpose, we have performed numerical diagonalizations for a double quantum dot around the regime of filling factor 2. We present phase diagrams in terms of tunneling and Zeeman couplings, and confinement strength. We identify a series of transitions from ferromagnetic to symmetric states through a set of canted states with antiferromagnetic couping between the two quantum dots.

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