|Title:||Network Model for Anderson Localization in Two-Dimensional Electron Gas with Strong Spin-orbit Coupling|
|Group/Series/Folder:||Record Group 8.15 - Institute for Advanced Study|
Series 3 - Audio-visual Materials
|Location:||8.15:3 box 1.8|
|Notes:||IAS Symposium on Frontiers in Condensed Matter Physics. Talk no. 9|
Title from title slide.
Abstract: Review results of numerical studies on the Anderson localization problem in two-dimensional electron gas with strong spin-orbit coupling. The electronic transport in such electron gas can be effectively simulated using a network model for the symplectic class, which is two sheets of the Chalker-Coddington network model (for up and down spin electrons) coupled by spin-flip scattering matrices. In this formulation a two-dimensional topological insulator (quantum spin Hall) phase and an ordinary insulating phase are distinguished merely by the boundary condition imposed on the network model. It is therefore natural to expect (as numerically confirmed) that critical properties are the same for a metal-to-(normal insulator) transition and a metal-to-(topological insulator) transition. However, a clear distinction between the two types of metal-to-insulator transitions can be seen in boundary multifractal spectra of critical wave functions. Discuss boundary multifractali! ty and its connection to conformal invariance.
Duration: 41 min.
|Appears in Series:||8.15:3 - Audio-visual Materials|
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