Bilayer quantum Hall system at nu(t)=1: Pseudospin models and in-plane magnetic field

Article

关键词: SPONTANEOUS INTERLAYER COHERENCE;    PHASE-TRANSITIONS;   

DOI  :  10.1103/PhysRevB.80.205315

来源: SCIE

【 摘 要 】

We investigate two theoretical pseudomagnon-based models for a bilayer quantum Hall system (BQHS) at total filling factor nu(t)=1. We find a unifying framework which elucidates the different approximations that are made. We also consider the effect of an in-plane magnetic field in BQHSs at nu(t)=1, by deriving an equation for the ground-state energy from the underlying microscopic physics. Although this equation is derived for small in-plane fields, its predictions agree with recent experimental findings at stronger in-plane fields, for low electron densities. We also take into account finite-temperature effects by means of a renormalization group analysis, and find that they are small at the temperatures that were investigated experimentally.

【 授权许可】

Free