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Mechanical control of physical properties in the van der Waals ferromagnet Cr2Ge2Te6 via application of electric current

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arxiv 2201.08509 v1 pith:JKCHD53Y submitted 2022-01-21 cond-mat.mtrl-sci cond-mat.str-el

Mechanical control of physical properties in the van der Waals ferromagnet Cr2Ge2Te6 via application of electric current

classification cond-mat.mtrl-sci cond-mat.str-el
keywords cr2ge2te6anisotropicapplicationcurrentelectricmagneticferromagnetmechanical
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Cr2Ge2Te6 is a van der Waals ferromagnet with a Curie temperature at 66 K. Here we report a swift change in the magnetic ground state upon application of small DC electric current, a giant yet anisotropic magnetoelectric effect, and a sharp, lattice-driven quantum switching manifested in the I-V characteristic of the bulk single-crystal Cr2Ge2Te6. At the heart of these observed phenomena is a newly uncovered, strongly anisotropic magnetoelastic coupling that enables strongly anisotropic responses of the lattice to application of electric current and/or magnetic field, thus the exotic phenomena in Cr2Ge2Te6. Such a rare mechanical tunability in the magnetic semiconductors promises tantalizing prospects for unique functional materials and devices.

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