https://scholars.lib.ntu.edu.tw/handle/123456789/633827
標題: | Quantum Hall plateau-plateau transition revisited | 作者: | Yeh, Ching Chen Wang, Siang Chi Lo, Shun Tsung Kim, Gil Ho Ritchie, D. A. Strasser, Gottfried CHI-TE LIANG |
關鍵字: | Critical exponent | Quantum Hall plateau | Transition | Two-dimensional critical magnetic field | 公開日期: | 1-四月-2023 | 卷: | 82 | 來源出版物: | Chinese Journal of Physics | 摘要: | We observe a temperature-independent point Bc in the longitudinal resistance Rxx of a GaAs-based two-dimensional electron gas in the quantum Hall plateau-plateau transition. This allows us to revisit the spin-degenerate plateau-plateau transition and use the Rxx peak movement with respect to Bc at various temperatures T so as to calculate the critical exponent κ. We suggest that one measures the maximum of the derivative of Hall resistivity dρxy/dB ∼ T−κ as well as the movement of Rxx at different temperatures, allowing one to measure κs using two independent methods. When the peak movement is so large that the resistance peak is no longer in the vicinity of Bc, a largely deviated κ =0.54±0.04 from the value (0.21±0.02 ) in some spin-degenerate system can be measured. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633827 | ISSN: | 05779073 | DOI: | 10.1016/j.cjph.2022.12.016 |
顯示於: | 物理學系 |
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