Strain-Induced Interlayer Parallel-to-Antiparallel Magnetic Transitions of Twisted Bilayers

Jian Jun Wang; Tian Nan Yang; Bo Wang; Mark S. Rzchowski; Chang Beom Eom; Long Qing Chen

doi:10.1002/adts.202000215

Strain-Induced Interlayer Parallel-to-Antiparallel Magnetic Transitions of Twisted Bilayers

Jian Jun Wang, Tian Nan Yang, Bo Wang, Mark S. Rzchowski, Chang Beom Eom, Long Qing Chen

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The discovery of superconductivity in twisted graphene bilayers with a magic twisting angle ≈1.1° has opened up a wide range of potential twistronic device possibilities. In this work, the twisting effects in spintronic devices are explored. In particular, a material prototype integrating spintronics, straintronics, and twistronics is developed by stacking a twisted CoFe₂O₄ (CFO) bilayer membrane on a Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ (PMN-PT) membrane. Phase-field simulations are performed to study the magnetic domain configurations and switching in CFO bilayers under piezostrains. An emerging interlayer parallel-to-antiparallel magnetic transition of the twisted CFO bilayer induced by appropriate piezostrain pulses generated from the PMN-PT membrane is discovered. Such a strain-induced parallel-to-antiparallel magnetic transition is non-volatile and reversible, arising from the synergistic interaction among spin, strain, and twisting order parameters. The present work provides a paradigm for designing novel spinotropic devices by taking advantage of the emerging phenomena generated by twisting.

Original language	English (US)
Article number	2000215
Journal	Advanced Theory and Simulations
Volume	4
Issue number	3
DOIs	https://doi.org/10.1002/adts.202000215
State	Published - Mar 2021

All Science Journal Classification (ASJC) codes

Statistics and Probability
Numerical Analysis
Modeling and Simulation
General

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title = "Strain-Induced Interlayer Parallel-to-Antiparallel Magnetic Transitions of Twisted Bilayers",

abstract = "The discovery of superconductivity in twisted graphene bilayers with a magic twisting angle ≈1.1° has opened up a wide range of potential twistronic device possibilities. In this work, the twisting effects in spintronic devices are explored. In particular, a material prototype integrating spintronics, straintronics, and twistronics is developed by stacking a twisted CoFe2O4 (CFO) bilayer membrane on a Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) membrane. Phase-field simulations are performed to study the magnetic domain configurations and switching in CFO bilayers under piezostrains. An emerging interlayer parallel-to-antiparallel magnetic transition of the twisted CFO bilayer induced by appropriate piezostrain pulses generated from the PMN-PT membrane is discovered. Such a strain-induced parallel-to-antiparallel magnetic transition is non-volatile and reversible, arising from the synergistic interaction among spin, strain, and twisting order parameters. The present work provides a paradigm for designing novel spinotropic devices by taking advantage of the emerging phenomena generated by twisting.",

author = "Wang, {Jian Jun} and Yang, {Tian Nan} and Bo Wang and Rzchowski, {Mark S.} and Eom, {Chang Beom} and Chen, {Long Qing}",

note = "Funding Information: The work at Penn State was supported by the Army Research Office under grant number W911NF‐17‐1‐0462; Division of Materials Research. The phase‐field simulations in this work were performed at the Extreme Science and Engineering Discovery Environment (XSEDE), supported by the National Science Foundation under grant number TG‐DMR170006. COMSOL computations for this research were performed on the Pennsylvania State University's Institute for CyberScience Advanced CyberInfrastructure (ICS‐ACI). Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

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AU - Chen, Long Qing

N1 - Funding Information: The work at Penn State was supported by the Army Research Office under grant number W911NF‐17‐1‐0462; Division of Materials Research. The phase‐field simulations in this work were performed at the Extreme Science and Engineering Discovery Environment (XSEDE), supported by the National Science Foundation under grant number TG‐DMR170006. COMSOL computations for this research were performed on the Pennsylvania State University's Institute for CyberScience Advanced CyberInfrastructure (ICS‐ACI). Publisher Copyright: © 2021 Wiley-VCH GmbH

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N2 - The discovery of superconductivity in twisted graphene bilayers with a magic twisting angle ≈1.1° has opened up a wide range of potential twistronic device possibilities. In this work, the twisting effects in spintronic devices are explored. In particular, a material prototype integrating spintronics, straintronics, and twistronics is developed by stacking a twisted CoFe2O4 (CFO) bilayer membrane on a Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) membrane. Phase-field simulations are performed to study the magnetic domain configurations and switching in CFO bilayers under piezostrains. An emerging interlayer parallel-to-antiparallel magnetic transition of the twisted CFO bilayer induced by appropriate piezostrain pulses generated from the PMN-PT membrane is discovered. Such a strain-induced parallel-to-antiparallel magnetic transition is non-volatile and reversible, arising from the synergistic interaction among spin, strain, and twisting order parameters. The present work provides a paradigm for designing novel spinotropic devices by taking advantage of the emerging phenomena generated by twisting.

AB - The discovery of superconductivity in twisted graphene bilayers with a magic twisting angle ≈1.1° has opened up a wide range of potential twistronic device possibilities. In this work, the twisting effects in spintronic devices are explored. In particular, a material prototype integrating spintronics, straintronics, and twistronics is developed by stacking a twisted CoFe2O4 (CFO) bilayer membrane on a Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) membrane. Phase-field simulations are performed to study the magnetic domain configurations and switching in CFO bilayers under piezostrains. An emerging interlayer parallel-to-antiparallel magnetic transition of the twisted CFO bilayer induced by appropriate piezostrain pulses generated from the PMN-PT membrane is discovered. Such a strain-induced parallel-to-antiparallel magnetic transition is non-volatile and reversible, arising from the synergistic interaction among spin, strain, and twisting order parameters. The present work provides a paradigm for designing novel spinotropic devices by taking advantage of the emerging phenomena generated by twisting.

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Strain-Induced Interlayer Parallel-to-Antiparallel Magnetic Transitions of Twisted Bilayers

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