Spin effects in the nu_T = 1 bilayer system: a clue to the nature of the compressible-incompressible phase transition

P. GIUDICI; K. MURAKI; N. KUMADA

Génova

Conferencia; Electronic Properties of 2-Dimensional Systems (EP2DS-2007); 2007

We investigate the dependence on spin of the transition from the quantum Hall (QH) state to the compressible state in bilayer electron systems at nu_T = 1. Applying an in-plane feld B, we demonstrate that, in the regime of negligible tunneling, the spin degree of freedom is a crucial variable in the phase transition. The quasiparticle gap of the QH state was investigated under the effects of B.