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Wang, Yi-Ting, Kim, Gil-Ho, Huang, C. F., Lo, Shun-Tsung, Chen, Wei-Jen, Nicholls, J.T,, Lin, Li-Hung, Richie, D.A., Chang, Y.H., Liang, C.T. and Dolan, Brian P. (2012) Probing temperature-driven flow lines in a gated two-dimensional electron gas with tunable spin-splitting. Journal of Physics: Condensed Matter, 24 (405801). ISSN 0953-8984
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Abstract
We study the temperature flow of conductivities in a gated GaAs two-dimensional electron gas
(2DEG) containing self-assembled InAs dots and compare the results with recent theoretical
predictions. By changing the gate voltage, we are able to tune the 2DEG density and thus vary
disorder and spin-splitting. Data for both the spin-resolved and spin-degenerate phase
transitions are presented, the former collapsing to the latter with decreasing gate voltage
and/or decreasing spin-splitting. The experimental results support a recent theory, based on
modular symmetry, which predicts how the critical Hall conductivity varies with spin-splitting.
| Item Type: | Article |
|---|---|
| Keywords: | temperature-driven flow lines; gated two-dimensional electron gas; tunable spin-splitting; |
| Academic Unit: | Faculty of Science and Engineering > Mathematical Physics |
| Item ID: | 4243 |
| Depositing User: | Dr. Brian Dolan |
| Date Deposited: | 11 Mar 2013 16:22 |
| Journal or Publication Title: | Journal of Physics: Condensed Matter |
| Publisher: | Institute of Physics |
| Refereed: | Yes |
| Related URLs: | |
| Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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