Hysteretic Resistance Spikes in Quantum Hall Ferromagnets without Domains

2004/12/31 by Henrique J. P. Freire, J. Carlos Egues
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.99.026801

published as Phys. Rev. Lett. 99, 026801 (2007) · 4 pages, 4 figures, published version (some changes to the text; same figures as in v1)

arxiv created 2007/07/12 · openalex publication_date 2007/07/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We use spin-density-functional theory to study recently reported hysteretic magnetoresistance rho(xx) spikes in Mn-based 2D electron gases [Phys. Rev. Lett. 89, 266802 (2002)10.1103/PhysRevLett.89.266802]. 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 rho(xx), we predict hysteretic dips in the Hall resistance rho(xy). Our theory, without domain walls, satisfactorily explains the recent data.

Citations

• Ising Quantum Hall Ferromagnet in Magnetically Doped Quantum Wells
• Exchange and correlation in atoms, molecules, and solids by the spin-density-functional formalism
• Spins, charges, and currents at domain walls in a quantum Hall Ising ferromagnet
• Resistance Spikes and Domain Wall Loops in Ising Quantum Hall Ferromagnets
• Accurate spin-dependent electron liquid correlation energies for local spin density calculations: a critical analysis