扭曲MoTe$_2$中的分数量子霍尔绝缘体-超导体转变是直接的么？

中文摘要 AI 辅助

在扭曲MoTe$_2$中观察到分数量子霍尔绝缘体附近的超导行为，引发了关于拓扑有序相与对称性破缺相之间可能存在直接“任意子超导”转变的兴奋。我们仔细检查了低温tMoTe$_2$相图中相关区域的实验测量输运数据，并提出了一种情景，其中邻近的重入整数量子霍尔效应（RIQHE）作为两者之间的中间相。虽然RIQHE在大位移场下最为显著，但我们提出它在极低温度下延伸至更小的场。基于这一图像，我们将样品建模为三个相的拼凑体，并表明这样的模型可以解释输运相图的主要定性特征，包括其对温度和位移场的依赖性。该模型预测，在较低电子温度下，零位移场处表观上的FCI-SC转变应分裂为两个转变，中间由一个狭窄的RIQHE区域隔开。

英文摘要

The observation of superconducting behaviour near a fractional Chern insulator in twisted MoTe$_2$ has sparked excitement about a possible direct "anyon superconducting" transition between a topologically ordered and a symmetry-broken phase. We carefully examine the experimentally measured transport data in the relevant region of the low-temperature tMoTe$_2$ phase diagram and propose a scenario where the nearby reentrant integer quantum Hall effect (RIQHE) acts as an intervening phase between the two. While the RIQHE is most prominent at large displacement fields, we propose that it extends to smaller fields at very low temperatures. Based on this picture, we model the sample as a patchwork of the three phases and show that such a model can explain the main qualitative features of the transport phase diagram, including its dependence on temperature and displacement field. The model predicts that at lower electronic temperatures the apparent FCI-SC transition at zero displacement field should split into two transitions separated by a narrow RIQHE region.

发表机构

• Rudolf Peierls Centre for Theoretical Physics（鲁道夫·派尔斯理论物理中心）

机构由 AI 辅助整理，请以论文原文为准。