Interaction-Driven Metal-Insulator Transition with Charge Fractionalization
Interaction-Driven Metal-Insulator Transition with Charge Fractionalization
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DOI：
10.1103/physrevx.12.021067
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发表时间：
2021-06
影响因子：
12.5
通讯作者：
Yichen Xu;Xiao-Chuan Wu;Mengxing Ye;Zhu-Xi Luo;Chao-Ming Jian;Cenke Xu
中科院分区：
文献类型：
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作者：
Yichen Xu;Xiao-Chuan Wu;Mengxing Ye;Zhu-Xi Luo;Chao-Ming Jian;Cenke Xu
提出了扩展版的Hubbard模型可以用过渡金属二卤化物(TMD)Moir‘{e}异质结很好地模拟。基于最近关于半填充连续金属-绝缘体转变(MIT)的报道，以及TMD Moir‘{e}异质结中不同分数填充处的相关绝缘体，我们提出了具有分数电荷的潜在连续MIT理论。麻省理工学院的电荷分馏将导致各种实验可观察到的效应，如在连续的麻省理工学院出现大的临界电阻率和大的普适电阻率跳跃。这些预测不同于以前提出的相互作用驱动的连续MIT理论。麻省理工学院附近的相态物理学也将被讨论。
It has been proposed that an extended version of the Hubbard model which potentially hosts rich correlated physics may be well simulated by the transition metal dichalcogenide (TMD) moir\'{e} heterostructures. Motivated by recent reports of continuous metal-insulator transition (MIT) at half filling, as well as correlated insulators at various fractional fillings in TMD moir\'{e} heterostructures, we propose a theory for the potentially continuous MIT with fractionalized electric charges. The charge fractionalization at the MIT will lead to various experimental observable effects, such as a large critical resistivity as well as large universal resistivity jump at the continuous MIT. These predictions are different from previously proposed theory for interaction-driven continuous MIT. Physics in phases near the MIT will also be discussed.