Resistance Spikes and Domain Wall Loops in Ising Quantum Hall Ferromagnets

2001/04/18 by T. Jungwirth, A. H. MacDonald · 5 citations
Engineering · Physics and Astronomy · #Advanced Memory and Neural Computing #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.87.216801

published as Phys. Rev. Lett. 87, 216801 (2001) · 4 pages, 3 figures

arxiv created 2001/04/18 · openalex publication_date 2001/10/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We explain the recent observation of resistance spikes and hysteretic transport properties in Ising quantum Hall ferromagnets in terms of the unique physics of their domain walls. Self-consistent RPA/Hartree-Fock theory is applied to microscopically determine properties of the ground state and domain wall excitations. In these systems domain wall loops support one-dimensional electron systems with an effective mass comparable to the bare electron mass and may carry charge. Our theory is able to account quantitatively for the experimental Ising critical temperature and to explain qualitative characteristics of the resistive hysteresis loops.

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• Spins, charges, and currents at domain walls in a quantum Hall Ising ferromagnet
• Nonlinear magnetic field dependence of spin polarization in high-density two-dimensional electron systems
• Hysteretic Resistance Spikes in Quantum Hall Ferromagnets without Domains
• Metastable phase in the quantum Hall ferromagnet
• Metamorphosis of the Quantum Hall Ferromagnet atν=2/5