Correlation Dimension in Two-Dimensional Disordered Systems with Rashba Spin-Orbit Coupling

Quantum Fest 2015

Hernández, E.M.^1 ; Otero, J.A.^1 ; Delgado, F.^1

Departamento de Física y Matemáticas, Escuela de Diseño, Ingeniería y Arquitectura, Tecnológico de Monterrey, Campus Estado de México, Atizapán, Estado de México

CP. 52926, Mexico^1

关键词: Correlation dimensions;    Electron Hamiltonian;    Metal-insulator phase transition;    Numerical solution;    Rashba spin-orbit coupling;    Spin-orbit couplings;    Statistical errors;    Universality class;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/698/1/012023/pdf
DOI  :  10.1088/1742-6596/698/1/012023

来源: IOP

【 摘 要 】

The metal-insulator phase transition that arises in the Integer Quantum Hall Effect has been characterized through the multifractal nature of extended states near the center of the Lowest Landau Level. In this work, we obtain numerical solutions for the one-electron Hamiltonian with disorder, where the correlation dimension of extended states in the first two Landau Levels is obtained, by taking into account the Rashba spin-orbit coupling in the Hamiltonian. Although, spin-orbit coupling at moderate field intensities has been determined experimentally, there is no theoretical evidence for the nature of the transition in this case. The correlation dimension of extended states for the resolved spin levels is obtained, and within the statistical error, it is found that the Rashba Hamiltonian in presence of disorder, belongs to the same universality class of spin unresolved systems.