魔角石墨烯加应变后电阻变化超普通金属100倍：《科学》11月12日刊华盛顿大学研究
美国华盛顿大学研究团队在2026年11月12日刊于《科学》的论文中报告，给魔角扭转双层石墨烯施加应变，可使材料电阻出现大幅摆动。所谓魔角指两层单原子厚碳片相对旋转约1.1度，麻省理工学院研究人员2018年发现该角度下材料在接近绝对零度时可进入超导状态。
团队与华盛顿大学物理学教授Jiun-Haw Chu的课题组紧密合作，把微小材料薄片固定在一台随电压伸缩的装置上，从而连续控制晶格的应变程度。结果显示，调节应变带来的电阻变化超过普通金属的100倍，样品冷却到极低温度时这一效应进一步放大。论文题为Giant elastoresistance in magic-angle twisted bilayer graphene，数字对象标识为10.1126/science.adz0597，第一作者为Xuetao Ma。
论文资深作者、华盛顿大学物理学与材料科学与工程副教授Matthew Yankowitz表示，原子级薄材料可承载超导、磁性等奇异量子态，团队如今加入了一种全新的操控方式，即直接使材料所谓的原子晶格形变，这使以往做不了的实验成为可能。Chu表示，这种对应变的巨大响应也出现在高温超导体等其他奇异材料中，这一共同联系使研究者离理解相关现象的成因更近一步。
Strain Swings the Resistance of Magic-Angle Graphene by More Than 100 Times That of an Ordinary Metal: University of Washington Study in Science on November 12
Researchers at the University of Washington reported in a paper published in Science on November 12, 2026, that adding strain to magic-angle twisted bilayer graphene produced big swings in the material's electrical resistance. The magic angle is a rotation of about 1.1 degrees between two sheets of carbon one atom thick, at which MIT researchers showed in 2018 that the material can become superconducting when cooled to near absolute zero.
Working in close collaboration with the group of UW physics professor Jiun-Haw Chu, the team attached the tiny flakes to a device that expands and contracts as voltage is applied, so they could continuously control the degree of strain on the lattices. Adjusting the strain produced a change in resistance more than 100 times that in an ordinary metal, an effect further amplified when the sample was cooled to very low temperatures. The paper, by Xuetao Ma and co-authors, is titled Giant elastoresistance in magic-angle twisted bilayer graphene, with digital object identifier 10.1126/science.adz0597.
Senior author Matthew Yankowitz, a UW associate professor of physics and of materials science and engineering, said atomically thin materials can host superconductivity, magnetism and other exotic quantum states, and that the team has now added a fundamentally new way to manipulate them, by directly deforming the atomic lattice they live on, enabling experiments that were not possible before. Chu said the giant response to strain also appears in other exotic materials, including high-temperature superconductors, and that this common link brings researchers a step closer to understanding what underlies these phenomena.
来源：《科学》
发布：GSM·美国（发布链接）
图片来源：外延石墨烯表面显微图像（资料图）。／Microscopic image of an epitaxial graphene surface (file photo).（Nathan Guisinger, EMMD Group，公共领域，Wikimedia Commons）
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