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arXiv 2402.17832cond-mat.mes-hallcond-mat.mtrl-scicond-mat.str-el
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莫尔超晶格分数填充下的量子反常霍尔晶体

Quantum anomalous Hall crystal at fractional filling of moiré superlattices

D. N. Sheng, Aidan P. Reddy, Ahmed Abouelkomsan, Emil J. Bergholtz, Liang Fu

AI总结:

本研究预测分数填充莫尔超晶格中存在铁磁、电荷有序与拓扑交织的量子反常霍尔晶态,其量子化整数霍尔电导异于常规预期,且tMoTe₂双层在大扭转角半填充时该相稳定。

摘要:

我们预测,在分数填充的莫尔超晶格能带中会出现一种铁磁性、电荷有序和拓扑相互交织的物质态。值得注意的是,这些量子反常霍尔晶体表现出量子化的整数霍尔电导,其数值与根据能带填充数和陈数预期的结果不同。微观计算表明,在扭曲半导体双层tMoTe₂的较大扭转角下,该相在半填充(ν=1/2)时能稳定存在。

英文摘要:

We predict the emergence a state of matter with intertwined ferromagnetism, charge order and topology in fractionally filled moiré superlattice bands. Remarkably, these quantum anomalous Hall crystals exhibit a quantized integer Hall conductance that is different than expected from the filling and Chern number of the band. Microscopic calculations show that this phase is robustly favored at half-filling ($ν=1/2$) at larger twist angles of the twisted semiconductor bilayer $t$MoTe$_2$

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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