Hysteretic resistance spikes in quantum Hall ferromagnets without domains

Abstract

We use spin-density-functional theory to study recently reported hysteretic magnetoresistance ρ_{xx} spikes in Mn-based 2D electron gases [Jaroszyński et al. Phys. Rev. Lett. (2002)]. We find hysteresis loops in our calculated Landau fan diagrams and total energies signaling quantum-Hall-ferromagnet phase transitions. Spin-dependent exchange-correlation effects are crucial to stabilize the relevant magnetic phases arising from distinct symmetry-broken excited- and ground-state solutions of the Kohn-Sham equations. Besides hysteretic spikes in ρ_{xx}, we predict hysteretic dips in the Hall resistance ρ_{xy}. Our theory, without domain walls, satisfactorily explains the recent data.

arXiv comment4 pages, 4 figures, published version (some changes to the text; same figures as in v1)

References in corpus (13)

• Resistance Spikes at Transitions between Quantum Hall Ferromagnets
• First-Order Phase Transition in a Quantum Hall Ferromagnet
• Resistance spikes and domain wall loops in Ising quantum Hall ferromagnets
• Magnetic Anisotropy in Quantum Hall Ferromagnets
• Quantum Hall Ferromagnetism in a Two-Dimensional Electron System
• Ising Quantum Hall Ferromagnet in Magnetically Doped Quantum Wells
• Experimental evidence for the formation of stripe phases in Si/SiGe
• Disorder and interactions in quantum Hall ferromagnets near $\nu =1$
• Spins, charges and currents at Domain Walls in a Quantum Hall Ising Ferromagnet
• Highly Anisotropic Transport in the Integer Quantum Hall Effect
• Quantum Hall ferromagnets, cooperative transport anisotropy, and the random field Ising model
• Landau Level Crossings and Extended-State Mapping in Magnetic Two-dimensional Electron Gases
• Metamorphosis of the Quantum Hall Ferromagnet at $\nu =2/5$

Cited by in corpus (5)

• Many-body effects on the ${\rho }_{xx}$ ringlike structures in two-subband wells
• Quantum Hall states under conditions of vanishing Zeeman energy
• Collapse of ${\rho }_{xx}$ ringlike structures in 2DEGs under tilted magnetic fields
• Exact Exchange: a pathway for a Density Functional Theory of the Integer Quantum Hall Effect
• Conductance resonances and crossing of the edge channels in the quantum Hall ferromagnet state of Cd(Mn)Te microstructures