物理学进展2026，Vol.46Issue(1)：1-12,12.DOI:10.13725/j.cnki.pip.2026.01.001
石墨烯量子霍尔边缘间的负库仑拖拽
Negative Coulomb drag between graphene quantum Hall edges
摘要
Abstract
Coulomb drag refers to the phenomenon in which a current driven through one conducting layer induces a voltage nearby,electrically isolated layer sorely through interlayer Coulomb interactions between charge carriers.It has been extensively studied in various sys-tems,including parallel nanowires,double quantum wells,and double-layer graphene.Here,we report the observation of Coulomb drag in a novel system consisting of two graphene layers separated laterally by a 30 nm gap within the material plane,exhibiting behavior distinct from that in vertical graphene heterostructures.Our experiments reveal pronounced negative drag resistances under an out-of-plane magnetic field at the quantum Hall edges,reaching a maxi-mum when the carrier densities in both graphene layers are tuned to the charge neutrality point via gate voltages.Our work establish two separate and spatially closed quantum Hall edge modes as a new platform to explore electronic interaction physics between one dimensional systems.关键词
负库仑拖拽/量子霍尔边缘/范德瓦耳斯异质结Key words
negative Coulomb drag/quantum Hall edges/van der Waals heterostructures分类
数理科学引用本文复制引用
宋珺威,甘祺康,朱旺,渡边贤司,谷口尚,于葛亮,王雷..石墨烯量子霍尔边缘间的负库仑拖拽[J].物理学进展,2026,46(1):1-12,12.基金项目
L.W.acknowledges support from the National Key Projects for Research and Development of China(Grant Nos.2022YFA1204700,2021YFA1400400),Na-tional Natural Science Foundation of China(Grant No.12525403),Natural Science Foundation of Jiangsu Province(Grant Nos.BK20220066,BK20233001)and Program for Innovative Talents and Entrepreneur in Jiangsu(Grant No.JSSCTD202101).K.W.and T.T.acknowledge support from the JSPS KAKENHI(Grant Numbers 21H05233 and 23H02052)and World Pre-mier International Research Center Initiative(WPI),MEXT,Japan. （Grant Nos.2022YFA1204700,2021YFA1400400）
