Asymmetric Modulation on Exchange Field in a Graphene/BiFeO3 Heterostructure by External Magnetic Field

Hua Ding Song; Yan Fei Wu; Xin Yang; Zhaohui Ren; Xiaoxing Ke; Mert Kurttepeli; Gustaaf Van Tendeloo; Dameng Liu; Han Chun Wu; Baoming Yan; Xiaosong Wu; Chun Gang Duan; Gaorong Han; Zhi Min Liao; Dapeng Yu

doi:10.1021/acs.nanolett.7b05480

Asymmetric Modulation on Exchange Field in a Graphene/BiFeO₃ Heterostructure by External Magnetic Field

Hua Ding Song, Yan Fei Wu, Xin Yang, Zhaohui Ren, Xiaoxing Ke, Mert Kurttepeli, Gustaaf Van Tendeloo, Dameng Liu, Han Chun Wu, Baoming Yan, Xiaosong Wu, Chun Gang Duan, Gaorong Han, Zhi Min Liao^*, Dapeng Yu

^*Corresponding author for this work

School of Physics

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Graphene, having all atoms on its surface, is favorable to extend the functions by introducing the spin-orbit coupling and magnetism through proximity effect. Here, we report the tunable interfacial exchange field produced by proximity coupling in graphene/BiFeO₃ heterostructures. The exchange field has a notable dependence with external magnetic field, and it is much larger under negative magnetic field than that under positive magnetic field. For negative external magnetic field, interfacial exchange coupling gives rise to evident spin splitting for N = 0 Landau levels and a quantum Hall metal state for N = 0 Landau level. Our findings suggest graphene/BiFeO₃ heterostructures are promising for spintronics.

Original language	English
Pages (from-to)	2435-2441
Number of pages	7
Journal	Nano Letters
Volume	18
Issue number	4
DOIs	https://doi.org/10.1021/acs.nanolett.7b05480
Publication status	Published - 11 Apr 2018

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title = "Asymmetric Modulation on Exchange Field in a Graphene/BiFeO3 Heterostructure by External Magnetic Field",

abstract = "Graphene, having all atoms on its surface, is favorable to extend the functions by introducing the spin-orbit coupling and magnetism through proximity effect. Here, we report the tunable interfacial exchange field produced by proximity coupling in graphene/BiFeO3 heterostructures. The exchange field has a notable dependence with external magnetic field, and it is much larger under negative magnetic field than that under positive magnetic field. For negative external magnetic field, interfacial exchange coupling gives rise to evident spin splitting for N = 0 Landau levels and a quantum Hall metal state for N = 0 Landau level. Our findings suggest graphene/BiFeO3 heterostructures are promising for spintronics.",

author = "Song, {Hua Ding} and Wu, {Yan Fei} and Xin Yang and Zhaohui Ren and Xiaoxing Ke and Mert Kurttepeli and Tendeloo, {Gustaaf Van} and Dameng Liu and Wu, {Han Chun} and Baoming Yan and Xiaosong Wu and Duan, {Chun Gang} and Gaorong Han and Liao, {Zhi Min} and Dapeng Yu",

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doi = "10.1021/acs.nanolett.7b05480",

language = "English",

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TY - JOUR

T1 - Asymmetric Modulation on Exchange Field in a Graphene/BiFeO3 Heterostructure by External Magnetic Field

AU - Song, Hua Ding

AU - Wu, Yan Fei

AU - Yang, Xin

AU - Ren, Zhaohui

AU - Ke, Xiaoxing

AU - Kurttepeli, Mert

AU - Tendeloo, Gustaaf Van

AU - Liu, Dameng

AU - Wu, Han Chun

AU - Yan, Baoming

AU - Wu, Xiaosong

AU - Duan, Chun Gang

AU - Han, Gaorong

AU - Liao, Zhi Min

AU - Yu, Dapeng

PY - 2018/4/11

Y1 - 2018/4/11

N2 - Graphene, having all atoms on its surface, is favorable to extend the functions by introducing the spin-orbit coupling and magnetism through proximity effect. Here, we report the tunable interfacial exchange field produced by proximity coupling in graphene/BiFeO3 heterostructures. The exchange field has a notable dependence with external magnetic field, and it is much larger under negative magnetic field than that under positive magnetic field. For negative external magnetic field, interfacial exchange coupling gives rise to evident spin splitting for N = 0 Landau levels and a quantum Hall metal state for N = 0 Landau level. Our findings suggest graphene/BiFeO3 heterostructures are promising for spintronics.

AB - Graphene, having all atoms on its surface, is favorable to extend the functions by introducing the spin-orbit coupling and magnetism through proximity effect. Here, we report the tunable interfacial exchange field produced by proximity coupling in graphene/BiFeO3 heterostructures. The exchange field has a notable dependence with external magnetic field, and it is much larger under negative magnetic field than that under positive magnetic field. For negative external magnetic field, interfacial exchange coupling gives rise to evident spin splitting for N = 0 Landau levels and a quantum Hall metal state for N = 0 Landau level. Our findings suggest graphene/BiFeO3 heterostructures are promising for spintronics.

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U2 - 10.1021/acs.nanolett.7b05480

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SN - 1530-6984

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EP - 2441

JO - Nano Letters

JF - Nano Letters

IS - 4

ER -

Asymmetric Modulation on Exchange Field in a Graphene/BiFeO₃ Heterostructure by External Magnetic Field

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