Large quantum anomalous Hall effect in spin-orbit proximitized rhombohedral graphene

被引：51

作者：

Han, Tonghang ^{[1
]}

Lu, Zhengguang ^{[1
]}

Yao, Yuxuan ^{[1
]}

Yang, Jixiang ^{[1
]}

Seo, Junseok ^{[1
]}

Yoon, Chiho ^{[2
]}

Watanabe, Kenji ^{[3
]}

Taniguchi, Takashi ^{[4
]}

Fu, Liang ^{[1
]}

Zhang, Fan ^{[2
]}

Ju, Long ^{[1
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] Univ Texas Dallas, Dept Phys, Richardson, TX USA

[3] Natl Inst Mat Sci, Res Ctr Elect & Opt Mat, 1-1 Namiki, Tsukuba 3050044, Japan

[4] Natl Inst Mat Sci, Res Ctr Mat Nanoarchitecton, 1-1 Namiki, Tsukuba 3050044, Japan

来源：

SCIENCE | 2024年 / 384卷 / 6696期

关键词：

TRANSPORT; INSULATOR; SUPERCONDUCTIVITY; FERROMAGNETISM; SPECTROSCOPY; REALIZATION; DRIVEN; MODEL;

D O I：

10.1126/science.adk9749

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The quantum anomalous Hall effect (QAHE) is a robust topological phenomenon that features quantized Hall resistance at zero magnetic field. We report the QAHE in a rhombohedral pentalayer graphene-monolayer tungsten disulfide (WS2) heterostructure. Distinct from other experimentally confirmed QAHE systems, this system has neither magnetic element nor moir & eacute; superlattice effect. The QAH states emerge at charge neutrality and feature Chern numbers C = +/- 5 at temperatures of up to about 1.5 kelvin. This large QAHE arises from the synergy of the electron correlation in intrinsic flat bands of pentalayer graphene, the gate-tuning effect, and the proximity-induced Ising spin-orbit coupling. Our experiment demonstrates the potential of crystalline two-dimensional materials for intertwined electron correlation and band topology physics and may enable a route for engineering chiral Majorana edge states.

引用

页码：647 / 651

页数：5

共 54 条

[21] Experimental realization of the topological Haldane model with ultracold fermions [J].