【摘 要】
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We show that a weak hexagonal periodic potential can transform a two-dimensional electron gas with an even-denominator magnetic filling factor into an quantum anomalous hall insulator of composite fer
【机 构】
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Institute of Physics, Chinese Academy of Science, Beijing 100190, China
【出 处】
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第十三届国际凝聚态理论与计算材料学会议(The 13th International Conference on Con
论文部分内容阅读
We show that a weak hexagonal periodic potential can transform a two-dimensional electron gas with an even-denominator magnetic filling factor into an quantum anomalous hall insulator of composite fermions, giving rise to the fractionally quantized Hall effect.The system provides a realization of the Haidane honeycomb-net model, albeit in a composite fermion system.We further propose a trial wave function for the state, and numerically evaluate its relative stability against the competing Hofstadter state.Possible sets of experimental parameters are proposed.
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