Large Rashba spin-orbit coupling and high-temperature quantum anomalous Hall effect in Re-intercalated graphene/CrI3 heterostructure - Details

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Abstract：

In　2010,　the　quantum　anomalous　Hall　effect　(QAHE)　in　graphene　was　proposed　in　the　presence　of　Rashba　spin-orbit　coupling　and　a　ferromagnetic　exchange　field.　After　a　decade　of　experimental　exploration,　the　anomalous　Hall　conductance　can　only　reach　about　0.25　in　units　of　2e2/h,　which　was　attributed　to　the　tiny　Rashba　spin-orbit　coupling.　Here,　we　show　theoretically　that　Re-intercalation　in　a　graphene/CrI3　heterostructure　can　not　only　induce　sizable　Rashba　spin-orbit　coupling　(＞40　meV),　but　also　open　up　large　band　gaps　at　valleys　K　(22.2　meV)　and　K′　(30.3　meV),　and　a　global　band　gap　over　5.5　meV　(19.5　meV　with　random　Re　distribution)　hosting　QAHE.　A　low-energy　continuum　model　is　constructed　to　explain　the　underlying　physical　mechanism.　We　find　that　Rashba　spin-orbit　coupling　is　robust　against　external　stress　whereas　a　tensile　strain　can　increase　the　global　bulk　gap.　Furthermore,　we　comprehensively　explore　the　electronic　properties　of　3d,　4d,　5d　transition-metal　intercalation　in　graphene/CrI3　systems.　©　2023　American　Physical　Society.

Keyword：

Continuum mechanics Electronic properties Energy gap Graphene Quantum Hall effect Spin Hall effect Tensile strain Transition metals

Community：

[ 1 ] [Han, Yulei]International Center for Quantum Design of Functional Materials, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 2 ] [Han, Yulei]CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 3 ] [Han, Yulei]Department of Physics, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 4 ] [Yan, Zhi]International Center for Quantum Design of Functional Materials, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 5 ] [Yan, Zhi]CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 6 ] [Yan, Zhi]School of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Research Institute of Materials Science, Shanxi Normal University, Taiyuan; 030031, China
[ 7 ] [Li, Zeyu]International Center for Quantum Design of Functional Materials, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 8 ] [Li, Zeyu]CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 9 ] [Xu, Xiaohong]School of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, Research Institute of Materials Science, Shanxi Normal University, Taiyuan; 030031, China
[ 10 ] [Zhang, Zhenyu]International Center for Quantum Design of Functional Materials, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 11 ] [Zhang, Zhenyu]Hefei National Laboratory, University of Science and Technology of China, Hefei; 230088, China
[ 12 ] [Niu, Qian]CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 13 ] [Qiao, Zhenhua]International Center for Quantum Design of Functional Materials, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 14 ] [Qiao, Zhenhua]CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Anhui, Hefei; 230026, China
[ 15 ] [Qiao, Zhenhua]Hefei National Laboratory, University of Science and Technology of China, Hefei; 230088, China

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Source ：

Physical Review B

ISSN： 2469-9950

Year： 2023

Issue： 20

Volume： 107

3 . 2

JCR@2023

3 . 2 0 0

JCR@2023

JCR Journal Grade：2

CAS Journal Grade：2

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SCOPUS Cited Count： 5

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30 Days PV： 0

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