An anomalous Hall effect in edge-bonded monolayer graphene

被引：2

作者：

Liu, Hui ^{[1
,5
]}

Wang, Heng ^{[2
,3
]}

Peng, Zhisheng ^{[1
,5
]}

Jin, Jiyou ^{[1
,5
]}

Wang, Zhongpu ^{[1
,5
]}

Peng, Kang ^{[1
,5
]}

Wang, Wenxiang ^{[1
,5
]}

Xu, Yushi ^{[1
]}

Wang, Yu ^{[1
]}

Wei, Zheng ^{[1
,5
]}

Zhang, Ding ^{[2
,3
]}

Li, Yong Jun ^{[1
,4
,5
]}

Chu, Weiguo ^{[1
]}

Sun, Lianfeng ^{[1
,4
,5
]}

机构：

[1] Natl Ctr Nanosci & Technol, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

[2] Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[3] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[4] GBA Natl Inst Nanotechnol Innovat, Guangzhou 510700, Guangdong, Peoples R China

[5] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

NANOSCALE HORIZONS | 2023年 / 8卷 / 09期

基金：

中国国家自然科学基金;

关键词：

FERROMAGNETISM; STATE;

D O I：

10.1039/d3nh00233k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An anomalous Hall effect (AHE) is usually presumed to be absent in pristine graphene due to its diamagnetism. In this work, we report that a gate-tunable Hall resistance R-xy can be obtained in edge-bonded monolayer graphene without an external magnetic field. In a perpendicular magnetic field, R-xy consists of a sum of two terms: one from the ordinary Hall effect and the other from the AHE (R-AHE). Plateaus of R-xy & SIM; 0.94h/3e(2) and R-AHE & SIM; 0.88h/3e(2) have been observed while the longitudinal resistance R-xx decreases at a temperature of 2 K, which are indications of the quantum version of the AHE. At a temperature of 300 K, R-xx shows a positive, giant magnetoresistance of & SIM;177% and R-AHE still has a value of & SIM;400 & omega;. These observations indicate the existence of a long-range ferromagnetic order in pristine graphene, which may lead to new applications in pure carbon-based spintronics.

引用

页码：1235 / 1242

页数：8

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