Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer
Abstract
Engineering magnetic anisotropy in two-dimensional systems has enormous scientific and technological implications. The uniaxial anisotropy universally exhibited by two-dimensional magnets has only two stable spin directions, demanding 180° spin switching between states. We demonstrate a previously unobserved eightfold anisotropy in magnetic SrRuO3 monolayers by inducing a spin reorientation in (SrRuO3)1/(SrTiO3)N superlattices, in which the magnetic easy axis of Ru spins is transformed from uniaxial $$\langle 001 \rangle$$ direction (N < 3) to eightfold $$\langle 111 \rangle$$ directions (N ≥ 3). This eightfold anisotropy enables 71° and 109° spin switching in SrRuO3 monolayers, analogous to 71° and 109° polarization switching in ferroelectric BiFeO3. First-principle calculations reveal that increasing the SrTiO3 layer thickness induces an emergent correlation-driven orbital ordering, tuning spin-orbit interactions and reorienting the SrRuO3 monolayer easy axis. Our work demonstrates that correlation effects can be exploited to substantially change spin-orbit interactions, stabilizing unprecedented properties in two-dimensional magnets and opening rich opportunities for low-power, multistate device applications.
- Authors:
-
[1];
[2];
[3];
[6];
[7];
[8];
[10];
[8];
[2];
[8];
[12];
[13];
- Univ. of Science and Technology, Hefei (China). Hefei National Lab. for Physical Sciences at the Microscale, National Synchrotron Radiation Lab and Synergetic Innovation Center of Quantum Information and Quantum Physics
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Univ. of Science and Technology, Hefei (China). Hefei National Lab. for Physical Sciences at the Microscale, National Synchrotron Radiation Lab and Synergetic Innovation Center of Quantum Information and Quantum Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Univ. of Science and Technology, Hefei (China). Hefei National Lab. for Physical Sciences at the Microscale, National Synchrotron Radiation Lab.; Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
- Univ. of California, Irvine, CA (United States). Dept. of Physics
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- New York Univ. (NYU), Shanghai (China). NYU-ECNU Inst. of Physics
- Nankai Univ., Tianjin (China). School of Physics
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Cornell Univ., Ithaca, NY (United States). Cornell High Energy Synchrotron Source (CHESS)
- New York Univ. (NYU), Shanghai (China). NYU-ECNU Inst. of Physics; East China Normal Univ. (ECNU), Shanghai (China). State Key Laboratory of Precision Spectroscopy, School of Physical and Material Sciences; New York Univ. (NYU), NY (United States). Dept. of Physics
- Univ. of Science and Technology, Hefei (China). Hefei National Lab. for Physical Sciences at the Microscale, National Synchrotron Radiation Lab and Synergetic Innovation Center of Quantum Information and Quantum Physics; ShanghaiTech Univ. (China). School of Physical Science and Technology
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); Chinese Academy of Sciences; Shanghai Pujiang Talents Program
- OSTI Identifier:
- 1631656
- Alternate Identifier(s):
- OSTI ID: 1760291
- Grant/Contract Number:
- AC02-05CH11231; 2016YFA0401004; 51627901; 11574287; AC02-06CH11357; DMR-180781; 2016389; 11774236; 17PJ1407300
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 15; Journal ID: ISSN 2375-2548
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Cui, Zhangzhang, Grutter, Alexander J., Zhou, Hua, Cao, Hui, Dong, Yongqi, Gilbert, Dustin A., Wang, Jingyuan, Liu, Yi-Sheng, Ma, Jiaji, Hu, Zhenpeng, Guo, Jinghua, Xia, Jing, Kirby, Brian J., Shafer, Padraic, Arenholz, Elke, Chen, Hanghui, Zhai, Xiaofang, and Lu, Yalin. Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer. United States: N. p., 2020.
Web. doi:10.1126/sciadv.aay0114.
Cui, Zhangzhang, Grutter, Alexander J., Zhou, Hua, Cao, Hui, Dong, Yongqi, Gilbert, Dustin A., Wang, Jingyuan, Liu, Yi-Sheng, Ma, Jiaji, Hu, Zhenpeng, Guo, Jinghua, Xia, Jing, Kirby, Brian J., Shafer, Padraic, Arenholz, Elke, Chen, Hanghui, Zhai, Xiaofang, & Lu, Yalin. Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer. United States. https://doi.org/10.1126/sciadv.aay0114
Cui, Zhangzhang, Grutter, Alexander J., Zhou, Hua, Cao, Hui, Dong, Yongqi, Gilbert, Dustin A., Wang, Jingyuan, Liu, Yi-Sheng, Ma, Jiaji, Hu, Zhenpeng, Guo, Jinghua, Xia, Jing, Kirby, Brian J., Shafer, Padraic, Arenholz, Elke, Chen, Hanghui, Zhai, Xiaofang, and Lu, Yalin. Fri .
"Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer". United States. https://doi.org/10.1126/sciadv.aay0114. https://www.osti.gov/servlets/purl/1631656.
@article{osti_1631656,
title = {Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer},
author = {Cui, Zhangzhang and Grutter, Alexander J. and Zhou, Hua and Cao, Hui and Dong, Yongqi and Gilbert, Dustin A. and Wang, Jingyuan and Liu, Yi-Sheng and Ma, Jiaji and Hu, Zhenpeng and Guo, Jinghua and Xia, Jing and Kirby, Brian J. and Shafer, Padraic and Arenholz, Elke and Chen, Hanghui and Zhai, Xiaofang and Lu, Yalin},
abstractNote = {Engineering magnetic anisotropy in two-dimensional systems has enormous scientific and technological implications. The uniaxial anisotropy universally exhibited by two-dimensional magnets has only two stable spin directions, demanding 180° spin switching between states. We demonstrate a previously unobserved eightfold anisotropy in magnetic SrRuO3 monolayers by inducing a spin reorientation in (SrRuO3)1/(SrTiO3)N superlattices, in which the magnetic easy axis of Ru spins is transformed from uniaxial $\langle 001 \rangle$ direction (N < 3) to eightfold $\langle 111 \rangle$ directions (N ≥ 3). This eightfold anisotropy enables 71° and 109° spin switching in SrRuO3 monolayers, analogous to 71° and 109° polarization switching in ferroelectric BiFeO3. First-principle calculations reveal that increasing the SrTiO3 layer thickness induces an emergent correlation-driven orbital ordering, tuning spin-orbit interactions and reorienting the SrRuO3 monolayer easy axis. Our work demonstrates that correlation effects can be exploited to substantially change spin-orbit interactions, stabilizing unprecedented properties in two-dimensional magnets and opening rich opportunities for low-power, multistate device applications.},
doi = {10.1126/sciadv.aay0114},
journal = {Science Advances},
number = 15,
volume = 6,
place = {United States},
year = {Fri Apr 10 00:00:00 EDT 2020},
month = {Fri Apr 10 00:00:00 EDT 2020}
}
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