Quantum Hall ferromagnets, cooperative transport anisotropy, and the random field Ising model

Abstract

We discuss the behaviour of a quantum Hall system when two Landau levels with opposite spin and combined filling factor near unity are brought into energetic coincidence using an in-plane component of magnetic field. We focus on the interpretation of recent experiments under these conditions [Zeitler et al, Phys. Rev. Lett. 86, 866 (2001); Pan et al, Phys. Rev. B 64, 121305 (2001)], in which a large resistance anisotropy develops at low temperatures. Modelling the systems involved as Ising quantum Hall ferromagnets, we suggest that this transport anisotropy reflects domain formation induced by a random field arising from isotropic sample surface roughness.

4 pages, submitted to Physical Review B

References in corpus (3)

• An Investigation of Orientational Symmetry-Breaking Mechanisms in High Landau Levels
• Spins, charges and currents at Domain Walls in a Quantum Hall Ising Ferromagnet
• Highly Anisotropic Transport in the Integer Quantum Hall Effect

Cited by in corpus (14)

• Nematic Valley Ordering in Quantum Hall Systems
• Magnetoelectric coupling, Berry phase, and Landau level dispersion in a biased bilayer graphene
• Spontaneous Symmetry Breaking and Exotic Quantum Order in Integer Quantum Hall Systems under a Tilted Magnetic Field
• Mesoscopic transport in electrostatically-defined spin-full channels in quantum Hall ferromagnets
• Strong Transport Anisotropy in a Ge/SiGe Quantum Well in Tilted Magnetic Fields
• Electronic Transport Properties of the Ising Quantum Hall Ferromagnet in a Si Quantum Well
• Spin Mode-Switching at the Edge of a Quantum Hall System
• Spectral properties of rotating electrons in quantum dots and their relation to quantum Hall liquids
• Exact diagonalization study of domain structure in integer filling factor quantum Hall ferromagnets
• Hysteretic resistance spikes in quantum Hall ferromagnets without domains
• Electrostatic control of quantum Hall ferromagnetic transition, a step toward reconfigurable network of helical channels
• Anisotropic magnetoresistance in a 2DEG in a quasi-random magnetic field
• Anomalous coupling between magnetic and nematic orders in quantum Hall systems
• Magnetoresistivity in a Tilted Magnetic Field in p-Si/SiGe/Si Heterostructures with an Anisotropic g-Factor: Part II