期刊论文详细信息
Topological characterization of delocalization in a spin-orbit coupling system | |
Article | |
关键词: RANDOM MAGNETIC-FIELD; QUANTIZED HALL CONDUCTANCE; DENOMINATOR FILLING FRACTIONS; 2 DIMENSIONS; LOCALIZATION PROBLEM; STATES; PHASE; FLUX; TRANSITION; SCATTERING; | |
DOI : 10.1103/PhysRevB.54.R11070 | |
来源: SCIE |
【 摘 要 】
We show that wave functions in a two-dimensional (2D) electron system with spin-orbit coupling can be characterized by a topological quantity-the Chern integer due to the existence of the intrinsic Kramers degeneracy. The localization-delocalization transition in such a system is studied in terms of such a Chern number description, which reproduces the known metal-insulator transition point. The present work suggests a unified picture for various known 2D delocalization phenomena based on the same topological characterization.
【 授权许可】
Free