Effect of Subband Landau Level Coupling to the Linearly Dispersing Collective Mode in a Quantum Hall Ferromagnet

Abstract

In a recent experiment (Phys. Rev. Lett. {\bf 87}, 036903 (2001)), Spielman et al observed a linearly dispersing collective mode in quantum Hall ferromagnet. While it qualitatively agrees with the Goldstone mode dispersion at small wave vector, the experimental mode velocity is slower than that calculated by previous theories by a factor about 0.55. A better agreement with the experimental data may possibly be achieved by taking the subband Landau level coupling into account due to the finiteness of the layer thickness. A novel coupling of quantum fluctuation to the tunneling is briefly discussed.

arXiv comment4 pages; published version

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Cited by in corpus (6)

• Modulation of bilayer quantum Hall states by tilted-field-induced subband-Landau-level coupling
• Correlation energy, quantum phase transition, and bias potential effects in quantum Hall bilayers at nu=1
• The Effect of the Tilted Field in the Fractional Quantum Hall Systems: Numerical Studies for the Solid-liquid Transition
• Density-induced reorientation of the stripe at half-filled high Landau levels
• Temperature dependence of the conductivity of the electronic crystal
• A Novel Meron-induced Pseudospin Wave in Bilayer Quantum Hall Coherent State and the Residual Zero-bias Peak in Tunneling Conductance