Topological characterization of delocalization in a spin-orbit coupling system.
نویسندگان
چکیده
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. @S0163-1829~96!51140-9#
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ورودعنوان ژورنال:
- Physical review. B, Condensed matter
دوره 54 16 شماره
صفحات -
تاریخ انتشار 1996