2008/07/02 by Y. J. Zhao, Yu Zhao, Tao Tu +8
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.78.233301
published as Phys. Rev. B 78, 233301 (2008) · 11 pages, 4 figures
arxiv created 2008/07/02 · openalex publication_date 2008/12/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Temperature dependence of the longitudinal and Hall resistances is studied in the regime of localization-delocalization transition. We carry out measurements of scaling exponent \ensuremathκ in the Landau level mixing region at several filling factors. The localization exponent \ensuremathγ is extracted using an approach based on the variable-range hopping theory. The values of \ensuremathγ and \ensuremathκ are found to be universal and independent of the filling factor in our sample. We can conclude that although Landau level mixing can change the degeneracy of a quantum Hall state, the value of the scaling exponent remains the same for a given sample that contains a fixed disorder profile.