2003/04/17 by I V Plyushchay, I. V. Plyushchay, Rudolf A. Römer +3
Physics and Astronomy · #Quantum and electron transport phenomena #Theoretical and Computational Physics #Topological Materials and Phenomena #cond-mat.dis-nn
paper · pdf · doi:10.1103/physrevb.68.064201
published as Phys. Rev. B 68, 064201 (2003) · 9 RevTeX4 pages with 11 .eps figures included, submitted to PRB
arxiv created 2003/04/17 · openalex publication_date 2003/08/06 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the three-dimensional two-band Anderson model of localization and compare our results to experimental results for amorphous metallic alloys (AMA's). Using the transfer-matrix method, we identify and characterize the metal-insulator transitions as functions of Fermi level position, band broadening due to disorder and concentration of alloy composition. The appropriate phase diagrams of regions of extended and localized electronic states are studied and qualitative agreement with AMA's such as Ti-Ni and Ti-Cu metallic glasses is found. We estimate the critical exponents \ensuremathνW, \ensuremathνE and \ensuremathνx when either disorder W, energy E, or concentration x is varied, respectively. All our results are compatible with the universal value \ensuremathν\ensuremath≈1.6 obtained in the single-band Anderson model.