Quantum Hall Ferrimagnetism in lateral quantum dot molecules

Details Quantum Hall Ferrimagnetism in lateral quantum dot molecules Quantum Hall Ferrimagnetism in lateral quantum dot molecules

2006-07-25

arxiv.org/abs/cond-mat/0607638v1

Phys. Rev. Lett. 97, 186802 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.97.186802

We demonstrate the existance of ferrimagnetic and ferromagnetic phases in a spin phase diagram of coupled lateral quantum dot molecules in the quantum Hall regime. The spin phase diagram is determined from Hartree-Fock Configuration Interaction method as a function of electron numbers N, magnetic field B, Zeeman energy, and tunneling barrier height. The quantum Hall ferrimagnetic phase corresponds to spatially imbalanced spin droplets resulting from strong inter-dot coupling of identical dots. The quantum Hall ferromagnetic phases correspond to ferromagnetic coupling of spin polarization at filling factors between $\nu=2$ and $\nu=1$.

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