Dynamical Properties in the Bilayer Quantum Hall Ferromagnet

Abstract

The spectral functions of the pseudospin correlation functions in the bilayer quantum Hall system at ν=1 are investigated numerically, where the pseudospin describes the layer degrees of freedom. In the pseudospin-ferromagnetic phase, the lowest-energy excitation branch is closely connected with the ground state through the fluctuations of pseudospin S_y and S_z, and it plays a significant role on the tunneling properties in this system. For the system with very small tunneling amplitude and layer separation smaller than the critical one, the system-size dependence of calculated spectral function A_{y z} suggests the superfluidity on the tunneling current in the absence of impurities.

4 pages, 1 Postscript figure

References in corpus (1)

• Observation of a Linearly Dispersing Collective Mode in a Quantum Hall Ferromagnet

Cited by in corpus (3)

• Entanglement Spectrum and Entanglement Thermodynamics of Quantum Hall Bilayers at nu=1
• Quantum and Classical Dissipative Effects on Tunnelling in Quantum Hall Bilayers
• Correlation energy, quantum phase transition, and bias potential effects in quantum Hall bilayers at nu=1