Strong interactions and isospin symmetry breaking in a supermoiré lattice

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-07-03 DOI:10.1126/science.adl2544

Yonglong Xie, Andrew T. Pierce, Jeong Min Park, Daniel E. Parker, Jie Wang, Patrick Ledwith, Zhuozhen Cai, Kenji Watanabe, Takashi Taniguchi, Eslam Khalaf, Ashvin Vishwanath, Pablo Jarillo-Herrero, Amir Yacoby

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引用次数: 0

Abstract

In multilayer moiré heterostructures, the interference of multiple twist angles ubiquitously leads to tunable ultra-long-wavelength patterns known as supermoiré lattices. However, their impact on the system’s many-body electronic phase diagram remains largely unexplored. We present local compressibility measurements revealing numerous incompressible states resulting from supermoiré-lattice-scale isospin symmetry breaking driven by strong interactions. By using the supermoiré lattice occupancy as a probe of isospin symmetry, we observe an unexpected doubling of the miniband filling near ν = − 2 , possibly indicating a hidden phase transition or normal-state pairing proximal to the superconducting phase. Our work establishes supermoiré lattices as a tunable parameter for designing quantum phases and an effective tool for unraveling correlated phenomena in moiré materials.

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超微晶格中的强相互作用和同位旋对称性破缺

在多层moirir异质结构中，多个扭曲角的干涉无处不在，导致可调谐的超长波长模式，即超moirir晶格。然而，它们对系统的多体电子相图的影响在很大程度上仍未被探索。我们提出了局部可压缩性测量结果，揭示了由强相互作用驱动的超莫尔-晶格尺度同位旋对称破缺所导致的许多不可压缩状态。利用超晶格占位作为同位旋对称的探针，我们观察到ν =−2附近的迷你带填充出乎意料地加倍，这可能表明在超导相附近有一个隐藏的相变或正常状态配对。我们的工作建立了超微晶格作为设计量子相的可调参数和揭示微晶格材料中相关现象的有效工具。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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