Observation of enhanced spin-spin correlations at triple point in 2D ferromagnetic Cr2X2Te6 (X=Si, Ge)

Yugang Zhang; Zefang Li; Jing Zhang; Long Zhang; Yonghong Li; Shuang Liu; Young Sun; Wenhong Wang; Yisheng Chai

doi:10.1103/PhysRevB.107.134417

Observation of enhanced spin-spin correlations at triple point in 2D ferromagnetic Cr2X2Te6 (X=Si, Ge)

Materials Science 2024-01-17 v1 Strongly Correlated Electrons

Authors: Yugang Zhang , Zefang Li , Jing Zhang , Long Zhang , Yonghong Li , Shuang Liu , Young Sun , Wenhong Wang , Yisheng Chai

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Abstract

The domain dynamics and spin-spin correlation of 2D ferromagnets Cr2X2Te6 (X=Si, Ge) are investigated by a composite magnetoelectric method. The magnetic field-temperature phase diagrams for both in-plane and out-of-plane magnetic fields disclose a triple point around TC and 1 kOe, where ferromagnetic, paramagnetic, and spin-polarized phases coexist. The magnetoelectric signal shows peak features at the phase boundaries and reaches the maximum at the triple point, suggesting significant enhancement of spin-spin correlations at this point. A comparison between two systems reveals that the spin-spin correlations in Cr2Si2Te6 are stronger than that in Cr2Ge2Te6.

Keywords

2D ferromagnets spin-spin correlations triple point Cr2X2Te6 magnetoelectric method phase diagram

Cite

@article{arxiv.2207.01846,
  title  = {Observation of enhanced spin-spin correlations at triple point in 2D ferromagnetic Cr2X2Te6 (X=Si, Ge)},
  author = {Yugang Zhang and Zefang Li and Jing Zhang and Long Zhang and Yonghong Li and Shuang Liu and Young Sun and Wenhong Wang and Yisheng Chai},
  journal= {arXiv preprint arXiv:2207.01846},
  year   = {2024}
}

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17 pages, 6 figures, submitted to PRL

Observation of enhanced spin-spin correlations at triple point in 2D ferromagnetic Cr2X2Te6 (X=Si, Ge)

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