Probing temperature-driven flow lines in a gated two-dimensional electron gas with tunable spin-splitting.

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.

DOI: 10.1088/0953-8984/24/40/405801

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Cite this paper

@article{Wang2012ProbingTF, title={Probing temperature-driven flow lines in a gated two-dimensional electron gas with tunable spin-splitting.}, author={Yi-Ting Wang and Gil-Ho Kim and Chi-Ying F. Huang and Shun-Tsung Lo and W M Chen and J . T . Nicholls and L S Lin and David A. Ritchie and Yuan Huei Chang and C . - T . Liang and Brian P. Dolan}, journal={Journal of physics. Condensed matter : an Institute of Physics journal}, year={2012}, volume={24 40}, pages={405801} }