中国物理B ›› 2026, Vol. 35 ›› Issue (7): 77506-077506.doi: 10.1088/1674-1056/ae6173

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Design of magnetoelectric coupling in ferroelectric metal

Wang Zhang(张旺) and Xue-Zeng Lu(逯学曾)†   

  1. Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, China
  • 收稿日期:2026-01-15 修回日期:2026-04-07 接受日期:2026-04-20 发布日期:2026-07-02
  • 通讯作者: Xue-Zeng Lu E-mail:xuezenglu@seu.edu.cn
  • 基金资助:
    W.Z. and X.-Z.L. were supported by the National Natural Science Foundation of China (Grant No. 12474081), the Open Research Fund of the Key Laboratory of Quantum Materials and Devices at Southeast University (Ministry of Education), and the Start-up Research Fund of Southeast University. The DFT calculations were performed on high-performance computers supported by the Big Data Computing Center of Southeast University.

Design of magnetoelectric coupling in ferroelectric metal

Wang Zhang(张旺) and Xue-Zeng Lu(逯学曾)†   

  1. Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, China
  • Received:2026-01-15 Revised:2026-04-07 Accepted:2026-04-20 Published:2026-07-02
  • Contact: Xue-Zeng Lu E-mail:xuezenglu@seu.edu.cn
  • Supported by:
    W.Z. and X.-Z.L. were supported by the National Natural Science Foundation of China (Grant No. 12474081), the Open Research Fund of the Key Laboratory of Quantum Materials and Devices at Southeast University (Ministry of Education), and the Start-up Research Fund of Southeast University. The DFT calculations were performed on high-performance computers supported by the Big Data Computing Center of Southeast University.

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摘要： Ferroelectricity and metallicity have traditionally been considered difficult to coexist until the experimental discovery of the polar metal LiOsO$_{3}$ in 2013. Polar metallic materials offer new opportunities for the development of nonvolatile memory. However, simultaneously achieving ferroelectricity, magnetic order, and their strong coupling in a single-phase material remains a challenge. To address this, by using a combination of first-principles calculations and magnetic space group symmetry analysis, we establish a design principle to find magnetoelectric (ME) multiferroics. Our results show that the (CrSb)$_{m}$/(BiSb)$_n$ superlattice with altermagnetic CrSb and ferroelectric BiSb can have ferroelectric and magnetic orders and metallicity. Furthermore, the switching of the polarization can effectively control the weak ferromagnetism in the superlattices, in which the strength of this ME coupling is correlated with the magnitude of the induced polarization in the CrSb layers. Our research provides a material design route for exploring multiferroics with ME coupling.

关键词: magnetoelectric effects and multiferroics, electron density of states, density functional theory calculations

Abstract: Ferroelectricity and metallicity have traditionally been considered difficult to coexist until the experimental discovery of the polar metal LiOsO$_{3}$ in 2013. Polar metallic materials offer new opportunities for the development of nonvolatile memory. However, simultaneously achieving ferroelectricity, magnetic order, and their strong coupling in a single-phase material remains a challenge. To address this, by using a combination of first-principles calculations and magnetic space group symmetry analysis, we establish a design principle to find magnetoelectric (ME) multiferroics. Our results show that the (CrSb)$_{m}$/(BiSb)$_n$ superlattice with altermagnetic CrSb and ferroelectric BiSb can have ferroelectric and magnetic orders and metallicity. Furthermore, the switching of the polarization can effectively control the weak ferromagnetism in the superlattices, in which the strength of this ME coupling is correlated with the magnitude of the induced polarization in the CrSb layers. Our research provides a material design route for exploring multiferroics with ME coupling.

Key words: magnetoelectric effects and multiferroics, electron density of states, density functional theory calculations

中图分类号:  (Magnetoelectric effects, multiferroics)

  • 75.85.+t
71.20.-b (Electron density of states and band structure of crystalline solids) 71.15.Mb (Density functional theory, local density approximation, gradient and other corrections)