Order parameter suppression in double layer quantum Hall ferromagnets
نویسندگان
چکیده
منابع مشابه
Order Parameter Suppression in Double Layer Quantum Hall Ferromagnets
Double-layer quantum Hall systems at Landau level filling factor ν = 1 have a broken symmetry ground state with spontaneous interlayer phase coherence and a gap between symmetric and antisymmetric subbands in the absence of interlayer tunneling. We examine the influence of quantum fluctuations on the spectral function of the symmetric Green’s function, probed in optical absorption experiments. ...
متن کاملQuantum and classical phase transitions in double-layer quantum Hall ferromagnets
We consider the problem of quantum and classical phase transitions in double-layer quantum Hall systems at ν = 1/m (m odd integers) from a long-wavelength statistical mechanics viewpoint. We derive an explicit mapping of the long-wavelength Lagrangian of the quantum Hall system into that of a three-dimensional isotropic classical XY model whose coupling constant depends on the quantum fluctuati...
متن کاملThermodynamics of quantum Hall ferromagnets.
The two-dimensional interacting electron gas at Landau level filling factor ν = 1 and temperature T = 0 is a strong ferromagnet; all spins are completely aligned by arbitrarily weak Zeeman coupling. We report on a theoretical study of its thermodynamic properties using a many-body perturbation theory approach and concentrating on the recently measured temperature dependence of the spin magnetiz...
متن کاملSkyrmion dynamics in quantum Hall ferromagnets
Exploring a classical solution of the non-linear sigma model for a quantum Hall ferromagnet, a skyrmion-magnon effective hamiltonian is obtained via the collective coordinates method. Using the Feynman-Vernon functional integral formalism for this model we find the temperature dependent transport coefficients which characterize a single skyrmion dynamics.
متن کاملMagnetic Anisotropy in Quantum Hall Ferromagnets
We show that the sign of magnetic anisotropy energy in quantum Hall ferromagnets is determined by a competition between electrostatic and exchange energies. Easy-axis ferromagnets tend to occur when Landau levels whose states have similar spatial profiles cross. We report measurements of integer QHE evolution with magnetic-field tilt. Reentrant behavior observed for the ν = 4 QHE at high tilt a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physica E: Low-dimensional Systems and Nanostructures
سال: 2000
ISSN: 1386-9477
DOI: 10.1016/s1386-9477(99)00133-2