标题： 魔角扭曲双层石墨烯中的巨大弹性电阻效应 显示英文标题

标题： Giant elastoresistance in magic-angle twisted bilayer graphene

摘要： 强关联和拓扑相在摩尔材料中对晶格几何结构极为敏感，这种敏感性体现在原子尺度和超晶格尺度上。扭转角、压力和应变直接改变晶格，因此作为非常有效的调节参数。我们研究了在连续单轴应变作用下的扭曲双层石墨烯的电输运特性。在接近魔法角度（$\approx 1.1^{\circ}$）时，器件表现出明显的弹性电阻，这种电阻依赖于能带填充和温度，并且其比例因子比传统金属大两个数量级。在选定的掺杂状态下，弹性电阻表现出类似居里-魏斯的温度发散。我们讨论了可能的微观起源，包括向列涨落和由波动同位旋矩产生的增强电子熵。我们的工作确立了单轴应变为摩尔材料中的相关物理提供了多功能探针。 显示英文摘要

摘要： Strongly correlated and topological phases in moir\'e materials are exquisitely sensitive to lattice geometry at both atomic and superlattice length scales. Twist angle, pressure, and strain directly modify the lattice, and thus act as highly effective tuning parameters. Here we examine electrical transport in twisted bilayer graphene subjected to continuous uniaxial strain. Near the magic angle ($\approx 1.1^{\circ}$), devices exhibit a pronounced elastoresistance that depends on band filling and temperature, with a gauge factor more than two orders of magnitude larger than that of conventional metals. In selected doping regimes the elastoresistance exhibits a Curie-Weiss-like temperature divergence. We discuss possible microscopic origins, including nematic fluctuations and enhanced electronic entropy from fluctuating isospin moments. Our work establishes uniaxial strain as a versatile probe of correlated physics in a moir\'e material.