Berry Phase Engineering in SrRuO3/SrIrO3/SrTiO3 Superlattices Induced by Band Structure Reconstruction

Dongxing Zheng; Yue-Wen Fang; Senfu Zhang; Peng Li; Yan Wen; Bin Fang; Xin He; Yan Li; Chenhui Zhang; Wenyi Tong; Wenbo Mi; Haili Bai; Husam N. Alshareef; Z. Q. Qiu; Xixiang Zhang

doi:10.1021/acsnano.0c10200

Berry Phase Engineering in SrRuO3/SrIrO3/SrTiO3 Superlattices Induced by Band Structure Reconstruction

Dongxing Zheng, Yue-Wen Fang, Senfu Zhang, Peng Li, Yan Wen, Bin Fang, Xin He, Yan Li, Chenhui Zhang, Wenyi Tong, Wenbo Mi, Haili Bai, Husam N. Alshareef, Z. Q. Qiu, Xixiang Zhang

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21 Scopus citations

Abstract

The Berry phase, which reveals the intimate geometrical structure underlying quantum mechanics, plays a central role in the anomalous Hall effect. In this work, we observed a sign change of Berry curvatures at the interface between the ferromagnet SrRuO3 (SRO) layer and the SrIrO3 (SIO) layer with strong spin-orbit coupling. The negative Berry curvature at the interface, induced by the strongly spin-orbit-coupled Ir 5d bands near the Fermi level, makes the SRO/SIO interface different from the SRO layer that has a positive Berry curvature. These opposite Berry curvatures led to two anomalous Hall effect (AHE) channels with opposite signs at the SRO/SIO interface and in the SRO layer, respectively, resulting in a hump-like feature in the Hall resistivity loop. This observation offers a straightforward explanation of the hump-like feature that is usually associated with the chiral magnetic structure or magnetic skyrmions. Hence, this study provides evidence to oppose the widely accepted claim that magnetic skyrmions induce the hump-like feature.

Original language	English (US)
Journal	ACS Nano
DOIs	https://doi.org/10.1021/acsnano.0c10200
State	Published - Feb 19 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-02-23
Acknowledged KAUST grant number(s): CRF-2015-SENSORS-2708, OSR-2017-CRG6-3427, OSR2019-CRG8-4801
Acknowledgements: This publication is based on research supported by the King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR), under award Nos. OSR2019-CRG8-4801, OSR-2017-CRG6-3427, and CRF-2015-SENSORS-2708. D.X.Z and H.L.B. acknowledge financial support from the National Natural Science Foundation of China (11704278, 51772207, and 11434006) and Natural
Science Foundation of Tianjin City (19JCQNJC03000). Z.Q.Q. acknowledges financial support from the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract No. DE-AC02-05CH11231 (van der Waals heterostructures program, KCWF16). Computational resources were provided by the New York University Shanghai.

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10.1021/acsnano.0c10200

https://repository.kaust.edu.sa/bitstream/10754/667517/1/2-Manuscript.pdf

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@article{5d7b7775c79d427282d107c2205032c5,

title = "Berry Phase Engineering in SrRuO3/SrIrO3/SrTiO3 Superlattices Induced by Band Structure Reconstruction",

abstract = "The Berry phase, which reveals the intimate geometrical structure underlying quantum mechanics, plays a central role in the anomalous Hall effect. In this work, we observed a sign change of Berry curvatures at the interface between the ferromagnet SrRuO3 (SRO) layer and the SrIrO3 (SIO) layer with strong spin-orbit coupling. The negative Berry curvature at the interface, induced by the strongly spin-orbit-coupled Ir 5d bands near the Fermi level, makes the SRO/SIO interface different from the SRO layer that has a positive Berry curvature. These opposite Berry curvatures led to two anomalous Hall effect (AHE) channels with opposite signs at the SRO/SIO interface and in the SRO layer, respectively, resulting in a hump-like feature in the Hall resistivity loop. This observation offers a straightforward explanation of the hump-like feature that is usually associated with the chiral magnetic structure or magnetic skyrmions. Hence, this study provides evidence to oppose the widely accepted claim that magnetic skyrmions induce the hump-like feature.",

author = "Dongxing Zheng and Yue-Wen Fang and Senfu Zhang and Peng Li and Yan Wen and Bin Fang and Xin He and Yan Li and Chenhui Zhang and Wenyi Tong and Wenbo Mi and Haili Bai and Alshareef, {Husam N.} and Qiu, {Z. Q.} and Xixiang Zhang",

note = "KAUST Repository Item: Exported on 2021-02-23 Acknowledged KAUST grant number(s): CRF-2015-SENSORS-2708, OSR-2017-CRG6-3427, OSR2019-CRG8-4801 Acknowledgements: This publication is based on research supported by the King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR), under award Nos. OSR2019-CRG8-4801, OSR-2017-CRG6-3427, and CRF-2015-SENSORS-2708. D.X.Z and H.L.B. acknowledge financial support from the National Natural Science Foundation of China (11704278, 51772207, and 11434006) and Natural Science Foundation of Tianjin City (19JCQNJC03000). Z.Q.Q. acknowledges financial support from the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract No. DE-AC02-05CH11231 (van der Waals heterostructures program, KCWF16). Computational resources were provided by the New York University Shanghai.",

year = "2021",

month = feb,

day = "19",

doi = "10.1021/acsnano.0c10200",

language = "English (US)",

journal = "ACS Nano",

issn = "1936-0851",

publisher = "American Chemical Society",

}

TY - JOUR

T1 - Berry Phase Engineering in SrRuO3/SrIrO3/SrTiO3 Superlattices Induced by Band Structure Reconstruction

AU - Zheng, Dongxing

AU - Fang, Yue-Wen

AU - Zhang, Senfu

AU - Li, Peng

AU - Wen, Yan

AU - Fang, Bin

AU - He, Xin

AU - Li, Yan

AU - Zhang, Chenhui

AU - Tong, Wenyi

AU - Mi, Wenbo

AU - Bai, Haili

AU - Alshareef, Husam N.

AU - Qiu, Z. Q.

AU - Zhang, Xixiang

N1 - KAUST Repository Item: Exported on 2021-02-23 Acknowledged KAUST grant number(s): CRF-2015-SENSORS-2708, OSR-2017-CRG6-3427, OSR2019-CRG8-4801 Acknowledgements: This publication is based on research supported by the King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR), under award Nos. OSR2019-CRG8-4801, OSR-2017-CRG6-3427, and CRF-2015-SENSORS-2708. D.X.Z and H.L.B. acknowledge financial support from the National Natural Science Foundation of China (11704278, 51772207, and 11434006) and Natural Science Foundation of Tianjin City (19JCQNJC03000). Z.Q.Q. acknowledges financial support from the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract No. DE-AC02-05CH11231 (van der Waals heterostructures program, KCWF16). Computational resources were provided by the New York University Shanghai.

PY - 2021/2/19

Y1 - 2021/2/19

N2 - The Berry phase, which reveals the intimate geometrical structure underlying quantum mechanics, plays a central role in the anomalous Hall effect. In this work, we observed a sign change of Berry curvatures at the interface between the ferromagnet SrRuO3 (SRO) layer and the SrIrO3 (SIO) layer with strong spin-orbit coupling. The negative Berry curvature at the interface, induced by the strongly spin-orbit-coupled Ir 5d bands near the Fermi level, makes the SRO/SIO interface different from the SRO layer that has a positive Berry curvature. These opposite Berry curvatures led to two anomalous Hall effect (AHE) channels with opposite signs at the SRO/SIO interface and in the SRO layer, respectively, resulting in a hump-like feature in the Hall resistivity loop. This observation offers a straightforward explanation of the hump-like feature that is usually associated with the chiral magnetic structure or magnetic skyrmions. Hence, this study provides evidence to oppose the widely accepted claim that magnetic skyrmions induce the hump-like feature.

AB - The Berry phase, which reveals the intimate geometrical structure underlying quantum mechanics, plays a central role in the anomalous Hall effect. In this work, we observed a sign change of Berry curvatures at the interface between the ferromagnet SrRuO3 (SRO) layer and the SrIrO3 (SIO) layer with strong spin-orbit coupling. The negative Berry curvature at the interface, induced by the strongly spin-orbit-coupled Ir 5d bands near the Fermi level, makes the SRO/SIO interface different from the SRO layer that has a positive Berry curvature. These opposite Berry curvatures led to two anomalous Hall effect (AHE) channels with opposite signs at the SRO/SIO interface and in the SRO layer, respectively, resulting in a hump-like feature in the Hall resistivity loop. This observation offers a straightforward explanation of the hump-like feature that is usually associated with the chiral magnetic structure or magnetic skyrmions. Hence, this study provides evidence to oppose the widely accepted claim that magnetic skyrmions induce the hump-like feature.

UR - http://hdl.handle.net/10754/667517

UR - https://pubs.acs.org/doi/10.1021/acsnano.0c10200

U2 - 10.1021/acsnano.0c10200

DO - 10.1021/acsnano.0c10200

M3 - Article

C2 - 33606942

SN - 1936-0851

JO - ACS Nano

JF - ACS Nano

ER -

Berry Phase Engineering in SrRuO3/SrIrO3/SrTiO3 Superlattices Induced by Band Structure Reconstruction

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