Experimental demonstration of a skyrmion-enhanced strain-mediated physical reservoir computing system

Yiming Sun; Tao Lin; Na Lei; Xing Chen; Wang Kang; Zhiyuan Zhao; Dahai Wei; Chao Chen; Simin Pang; Linglong Hu; Liu Yang; Enxuan Dong; Li Zhao; Lei Liu; Zhe Yuan; Aladin Ullrich; Christian H Back; Jun Zhang; Dong Pan; Jianhua Zhao; Ming Feng; Albert Fert; Weisheng Zhao

doi:10.1038/s41467-023-39207-9

Experimental demonstration of a skyrmion-enhanced strain-mediated physical reservoir computing system

Nat Commun. 2023 Jun 10;14(1):3434. doi: 10.1038/s41467-023-39207-9.

Authors

Yiming Sun^#¹, Tao Lin^#¹, Na Lei^#², Xing Chen^#¹, Wang Kang¹, Zhiyuan Zhao³, Dahai Wei³, Chao Chen¹, Simin Pang^{3

4}, Linglong Hu⁵, Liu Yang¹, Enxuan Dong¹, Li Zhao⁶, Lei Liu³, Zhe Yuan⁶, Aladin Ullrich⁷, Christian H Back^{8

9

10}, Jun Zhang^{3

4

11}, Dong Pan³, Jianhua Zhao³, Ming Feng¹², Albert Fert^{1

13}, Weisheng Zhao¹

Affiliations

¹ Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, Beijing, 100191, China.
² Fert Beijing Institute, MIIT Key Laboratory of Spintronics, School of Integrated Circuit Science and Engineering, Beihang University, Beijing, 100191, China. na.lei@buaa.edu.cn.
³ State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.
⁴ Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
⁵ Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, China.
⁶ The Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, Beijing, 100875, China.
⁷ Institute of Physics, University of Augsburg, Augsburg, 86159, Germany.
⁸ Department of Physics, Technical University of Munich, Garching, 85748, Germany.
⁹ Munich Center for Quantum Science and Technology (MCQST), Munich, 80799, Germany.
¹⁰ Centre for Quantum Engineering (ZQE), Technical University of Munich, 85748, Garching, Germany.
¹¹ CAS Center of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, 100049, China.
¹² Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, China. mingfeng@jlnu.edu.cn.
¹³ Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, Palaiseau, 91767, France.

^# Contributed equally.

Abstract

Physical reservoirs holding intrinsic nonlinearity, high dimensionality, and memory effects have attracted considerable interest regarding solving complex tasks efficiently. Particularly, spintronic and strain-mediated electronic physical reservoirs are appealing due to their high speed, multi-parameter fusion and low power consumption. Here, we experimentally realize a skyrmion-enhanced strain-mediated physical reservoir in a multiferroic heterostructure of Pt/Co/Gd multilayers on (001)-oriented 0.7PbMg_1/3Nb_2/3O₃-0.3PbTiO₃ (PMN-PT). The enhancement is coming from the fusion of magnetic skyrmions and electro resistivity tuned by strain simultaneously. The functionality of the strain-mediated RC system is successfully achieved via a sequential waveform classification task with the recognition rate of 99.3% for the last waveform, and a Mackey-Glass time series prediction task with normalized root mean square error (NRMSE) of 0.2 for a 20-step prediction. Our work lays the foundations for low-power neuromorphic computing systems with magneto-electro-ferroelastic tunability, representing a further step towards developing future strain-mediated spintronic applications.

MeSH terms

Electronics*
Glass*
Recognition, Psychology
Time Factors

Abstract

MeSH terms

Grants and funding