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説明:

The two-dimensional material Cr2⁢Ge2⁢Te6 is a member of the class of insulating van der Waals (vdW) magnets. Here, using high resolution angle-resolved photoemission spectroscopy in a detailed temperature dependence study, we identify a clear response of the electronic structure to a dimensional crossover in the form of two distinct temperature scales marking onsets of modifications in the electronic structure. Specifically, we observe Te 𝑝-orbital-dominated bands to undergo changes at the Curie transition temperature 𝑇𝐶 while the Cr 𝑑-orbital-dominated bands begin evolving at a higher temperature scale. Combined with neutron scattering, density functional theory calculations, and Monte Carlo simulations, we find that the electronic system can be consistently understood to respond sequentially to the distinct temperatures at which in-plane and out-of-plane spin correlations exceed a characteristic length scale. Our findings reveal the sensitivity of the orbital-selective electronic structure for probing the dynamical evolution of local moment correlations in vdW insulating magnets.

権利情報:

• In Copyright
  

キーワード: Magnetic order, Electronic structure, Magnetic phase transitions, Van der Waals systems, Angle-resolved photoemission spectroscopy

刊行年月日: 2024-01-12

出版者: American Physical Society

掲載誌:

• PHYSICAL REVIEW B (ISSN: 24699950) vol. 109 issue. 4 045416

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4990

公開URL: https://doi.org/10.1103/physrevb.109.045416

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更新時刻: 2024-11-19 16:30:44 +0900

MDRでの公開時刻: 2024-11-19 16:30:44 +0900