Quantum Hall ferrimagnetism in lateral quantum dot molecules.
We demonstrate the existence 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 the Hartree-Fock configuration interaction method as a function of electron number N and magnetic field B. The quantum Hall ferrimagnetic phase corresponds to spatially imbalanced spin droplets resulting from strong interdot 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.
Abolfath
Ramin M
RM
Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, K1A 0R6, Canada. abolfath@buffalo.edu
Hawrylak
Pawel
P