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Numerical study on Anderson transitions in three‐dimensional disordered systems in random magnetic fields
Author(s) -
Kawarabayashi Tohru,
Kramer Bernhard,
Ohtsuki Tomi
Publication year - 1999
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/(sici)1521-3889(199909)8:6<487::aid-andp487>3.0.co;2-9
Subject(s) - physics , critical exponent , universality (dynamical systems) , curse of dimensionality , statistical physics , random field , scalar (mathematics) , critical point (mathematics) , exponent , transfer matrix , anderson localization , scalar field , condensed matter physics , phase transition , mathematical physics , mathematical analysis , mathematics , statistics , linguistics , geometry , philosophy , computer science , computer vision
The Anderson transitions in a random magnetic field in three dimensions are investigated numerically. The critical behavior near the transition point is analyzed in detail by means of the transfer matrix method with high accuracy for systems both with and without an additional random scalar potential. We find the critical exponent ν for the localization length to be 1.45 ± 0.09 with a strong random scalar potential. Without it, the exponent is smaller but increases with the system sizes and extrapolates to the above value within the error bars. These results support the conventional classification of universality classes due to symmetry. Fractal dimensionality of the wave function at the critical point is also estimated by the equation‐of‐motion method.