Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2001-05-31
Phys. Rev. B 64, 155315 (2001).
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
15 pages, 5 figures
Scientific paper
10.1103/PhysRevB.64.155315
We present a microscopic theory of zero-temperature order parameter and pseudospin stiffness reduction due to quantum fluctuations in the ground state of double-layer quantum Hall ferromagnets. Collective excitations in this systems are properly described only when interactions in both direct and exchange particle-hole channels are included. We employ a functional integral approach which is able to account for both, and comment on its relation to diagrammatic perturbation theory. We also discuss its relation to Gaussian fluctuation approximations based on Hubbard-Stratonovich-transformation representations of interactions in ferromagnets and superconductors. We derive remarkably simple analytical expressions for the correlation energy, renormalized order parameter and renormalized pseudospin stiffness.
Joglekar Yogesh N.
MacDonald Allan. H.
No associations
LandOfFree
Microscopic Functional Integral Theory of Quantum Fluctuations in Double-Layer Quantum Hall Ferromagnets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Microscopic Functional Integral Theory of Quantum Fluctuations in Double-Layer Quantum Hall Ferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microscopic Functional Integral Theory of Quantum Fluctuations in Double-Layer Quantum Hall Ferromagnets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-250518