Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator

Yang Li; Mario Amado; Timo Hyart; Grzegorz P. Mazur; Vetle Risinggård; Thomas Wagner; Lauren McKenzie-Sell; Graham Kimbell; Joerg Wunderlich; Jacob Linder; Jason W.A. Robinson

doi:10.1103/PhysRevB.101.241405

Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator

Yang Li
, Mario Amado
, Timo Hyart
, Grzegorz P. Mazur
, Vetle Risinggård
, Thomas Wagner
, Lauren McKenzie-Sell
, Graham Kimbell
, Joerg Wunderlich
, Jacob Linder
, Jason W.A. Robinson

Not published at VTT

University of Cambridge
International Research Centre MagTop
Polish Academy of Sciences
Norwegian University of Science and Technology (NTNU)
Hitachi Cambridge Laboratory
University of Regensburg
Czech Academy of Sciences

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

7 Citations (Scopus)

Abstract

In the quantum Hall regime of graphene, antiferromagnetic and spin-polarized ferromagnetic states at the zeroth Landau level compete, leading to a canted antiferromagnetic state depending on the direction and magnitude of an applied magnetic field. Here, we investigate this transition at 2.7 K in graphene Hall bars that are proximity coupled to the ferrimagnetic insulator Y3Fe5O12. From nonlocal transport measurements, we demonstrate an induced magnetic exchange field in graphene, which lowers the magnetic field required to modulate the magnetic state in graphene. These results show that a magnetic proximity effect in graphene is an important ingredient for the development of two-dimensional materials in which it is desirable for ordered states of matter to be tunable with relatively small applied magnetic fields (>6 T).

Original language	English
Article number	241405
Journal	Physical Review B
Volume	101
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.101.241405
Publication status	Published - 15 Jun 2020
MoE publication type	A1 Journal article-refereed

Funding

The work was funded by the Royal Society and the Engineering and Physical Sciences Research Council (EPSRC, Grant No. EP/P026311/1). Y.L. was supported by the China Scholarship Council (CSC) Cambridge International Scholarship. J.L. and V.R. received funding from the Outstanding Academic Fellows Program at the NTNU, the NV-Faculty, and the Research Council of Norway (Grants No. 216700 and No. 240806) and funding for the Centre of Excellence QuSpin (Grant No. 262633). T.H. and G.P.M. were supported by the Foundation for Polish Science through the IRA Programme cofinanced by EU within SG OP. G.P.M. was supported by the National Science Center (Poland) through ETIUDA fellowship (Grant No. UMO-2017/24/T/ST3/00501).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

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10.1103/PhysRevB.101.241405

Cite this

Li, Y., Amado, M., Hyart, T., Mazur, G. P., Risinggård, V., Wagner, T., McKenzie-Sell, L., Kimbell, G., Wunderlich, J., Linder, J., & Robinson, J. W. A. (2020). Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator. Physical Review B, 101(24), Article 241405. https://doi.org/10.1103/PhysRevB.101.241405

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title = "Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator",

abstract = "In the quantum Hall regime of graphene, antiferromagnetic and spin-polarized ferromagnetic states at the zeroth Landau level compete, leading to a canted antiferromagnetic state depending on the direction and magnitude of an applied magnetic field. Here, we investigate this transition at 2.7 K in graphene Hall bars that are proximity coupled to the ferrimagnetic insulator Y3Fe5O12. From nonlocal transport measurements, we demonstrate an induced magnetic exchange field in graphene, which lowers the magnetic field required to modulate the magnetic state in graphene. These results show that a magnetic proximity effect in graphene is an important ingredient for the development of two-dimensional materials in which it is desirable for ordered states of matter to be tunable with relatively small applied magnetic fields (>6 T).",

author = "Yang Li and Mario Amado and Timo Hyart and Mazur, \{Grzegorz P.\} and Vetle Risingg{\aa}rd and Thomas Wagner and Lauren McKenzie-Sell and Graham Kimbell and Joerg Wunderlich and Jacob Linder and Robinson, \{Jason W.A.\}",

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Li, Y, Amado, M, Hyart, T, Mazur, GP, Risinggård, V, Wagner, T, McKenzie-Sell, L, Kimbell, G, Wunderlich, J, Linder, J & Robinson, JWA 2020, 'Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator', Physical Review B, vol. 101, no. 24, 241405. https://doi.org/10.1103/PhysRevB.101.241405

TY - JOUR

T1 - Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator

AU - Li, Yang

AU - Amado, Mario

AU - Hyart, Timo

AU - Mazur, Grzegorz P.

AU - Risinggård, Vetle

AU - Wagner, Thomas

AU - McKenzie-Sell, Lauren

AU - Kimbell, Graham

AU - Wunderlich, Joerg

AU - Linder, Jacob

AU - Robinson, Jason W.A.

PY - 2020/6/15

Y1 - 2020/6/15

N2 - In the quantum Hall regime of graphene, antiferromagnetic and spin-polarized ferromagnetic states at the zeroth Landau level compete, leading to a canted antiferromagnetic state depending on the direction and magnitude of an applied magnetic field. Here, we investigate this transition at 2.7 K in graphene Hall bars that are proximity coupled to the ferrimagnetic insulator Y3Fe5O12. From nonlocal transport measurements, we demonstrate an induced magnetic exchange field in graphene, which lowers the magnetic field required to modulate the magnetic state in graphene. These results show that a magnetic proximity effect in graphene is an important ingredient for the development of two-dimensional materials in which it is desirable for ordered states of matter to be tunable with relatively small applied magnetic fields (>6 T).

AB - In the quantum Hall regime of graphene, antiferromagnetic and spin-polarized ferromagnetic states at the zeroth Landau level compete, leading to a canted antiferromagnetic state depending on the direction and magnitude of an applied magnetic field. Here, we investigate this transition at 2.7 K in graphene Hall bars that are proximity coupled to the ferrimagnetic insulator Y3Fe5O12. From nonlocal transport measurements, we demonstrate an induced magnetic exchange field in graphene, which lowers the magnetic field required to modulate the magnetic state in graphene. These results show that a magnetic proximity effect in graphene is an important ingredient for the development of two-dimensional materials in which it is desirable for ordered states of matter to be tunable with relatively small applied magnetic fields (>6 T).

UR - https://www.scopus.com/pages/publications/85086992629

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DO - 10.1103/PhysRevB.101.241405

M3 - Article

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SN - 2469-9950

VL - 101

JO - Physical Review B

JF - Physical Review B

IS - 24

M1 - 241405

ER -

Transition between canted antiferromagnetic and spin-polarized ferromagnetic quantum Hall states in graphene on a ferrimagnetic insulator

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