2003/02/27 by P. J. H. Denteneer, R. T. Scalettar, Richard T. Scalettar · 1 citation
Physics and Astronomy · #Condensed matter physics #Electron #Hubbard model #Magnetic field #Monte Carlo method #Physics #Physics of Superconductivity and Magnetism #Quantum Monte Carlo #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Spin polarization #Superconductivity #Theoretical and Computational Physics #Zeeman effect #Zeeman energy #cond-mat.dis-nn #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.90.246401
published as Phys. Rev. Lett. 90, 246401 (2003) · 4 pages, 4 figures
arxiv created 2003/02/27 · openalex publication_date 2003/06/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The effect of a Zeeman magnetic field coupled to the spin of the electrons on the conducting properties of the disordered Hubbard model is studied. Using the determinant quantum Monte Carlo method, the temperature- and magnetic-field-dependent conductivity is calculated, as well as the degree of spin polarization. We find that the Zeeman magnetic field suppresses the metallic behavior present for certain values of interaction and disorder strength and is able to induce a metal-insulator transition at a critical field strength. It is argued that the qualitative features of magnetoconductance in this microscopic model containing both repulsive interactions and disorder are in agreement with experimental findings in two-dimensional electron and hole gases in semiconductor structures.