Canted ground state in artificial molecules at high magnetic fields

Abstract

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.

References in corpus (4)

• Broken Symmetry Ground States in ν=2 Bilayer Quantum Hall Systems
• Multiple quantum phases in artificial double-dot molecules
• Bilayer Quantum Hall Systems at Filling Factor ν=2: An Exact Diagonalisation Study
• Spin symmetry breaking in bilayer quantum Hall systems

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• Raman signatures of classical and quantum phases in coupled dots: A theoretical prediction
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• Quantum phases of correlated electrons in artificial molecules under magnetic fields
• Spin transitions induced by a magnetic field in quantum dot molecules
• Low energy excitations of double quantum dots in the lowest Landau level regime