Nonvolatile electrical control of 2D Cr2Ge2Te6 and intrinsic half metallicity in multiferroic hetero-structures

Asif Ilyas; Shuling Xiang; Miaogen Chen; Muhammad Yar Khan; Hua Bai; Pimo He; Yunhao Lu; Renren Deng

doi:10.1039/D0NR06054B

Nonvolatile electrical control of 2D Cr₂Ge₂Te₆ and intrinsic half metallicity in multiferroic hetero-structures†

Asif Ilyas,^a Shuling Xiang,^b Miaogen Chen,

*^ab Muhammad Yar Khan,

^a Hua Bai,*^c Pimo He,^c Yunhao Lu^c and Renren Deng*^a

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* Corresponding authors

^a School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
E-mail: phycmg@cjlu.edu.cn, rdeng@zju.edu.cn

^b Department of Physics, China Jiliang University, Hangzhou 310018, P. R. China

^c Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou 310027, P.R. China
E-mail: 11336029@zju.edu.cn

Abstract

The electrical control of two-dimensional (2D) van der Waals ferromagnets is a step forward for the realization of spintronic devices. However, using this approach for practical applications remains challenging due to its volatile memory. Herein, we adopt an alternative strategy, where the bistable ferroelectric switches (P↑ and P↓) of Sc₂CO₂ (SCO) assist the ferromagnetic states of Cr₂Ge₂Te₆ (CGT) in order to achieve non-volatile memories. Moreover, MXene SCO, being an aided layer in multiferroic CGT/SCO hetero-structures, also modifies the electronic properties of CGT to half metal by its polarized P↓ state. In contrast, the P↑ state does not change the semiconducting nature of CGT. Hence, non-volatile, electrical-controlled switching of ferromagnetic CGT can be engineered by the two opposite ferroelectric states of single layer SCO. Importantly, the magnetic easy axis of CGT switches from in-plane to out-of-plane when the direction of electric polarization of SCO is altered from P↓ to P↑.

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DOI: https://doi.org/10.1039/D0NR06054B
Article type: Paper
Submitted: 19 Aug 2020
Accepted: 07 Dec 2020
First published: 04 Jan 2021

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Nanoscale, 2021,13, 1069-1076

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Nonvolatile electrical control of 2D Cr₂Ge₂Te₆ and intrinsic half metallicity in multiferroic hetero-structures

A. Ilyas, S. Xiang, M. Chen, M. Y. Khan, H. Bai, P. He, Y. Lu and R. Deng, Nanoscale, 2021, 13, 1069 DOI: 10.1039/D0NR06054B

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Nonvolatile electrical control of 2D Cr₂Ge₂Te₆ and intrinsic half metallicity in multiferroic hetero-structures†

Abstract

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Nonvolatile electrical control of 2D Cr₂Ge₂Te₆ and intrinsic half metallicity in multiferroic hetero-structures

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