Details

Autor(en) / Beteiligte

• Wu, Han
• Zhu, Jian-Xin
• Chen, Lebing
• Butcher, Matthew W.
• Yue, Ziqin
• Yuan, Dongsheng
• He, Yu
• Oh, Ji Seop
• Gao, Bin
• Huang, Jianwei
• Wu, Shan
• Gong, Cheng
• Guo, Yucheng
• Mo, Sung-Kwan
• Denlinger, Jonathan
• Lu, Donghui
• Hashimoto, Makoto
• Stone, Matthew B.
• Kolesnikov, Alexander I.
• Chi, Songxue
• Kono, Junichiro
• Nevidomskyy, Andriy H.
• Birgeneau, Robert J.
• Dai, Pengcheng
• Yi, Ming

Titel

Two-step electronic response to magnetic ordering in a van der Waals ferromagnet

Ist Teil von

• Physical review. B, 2024-01, Vol.109 (4), Article 045416

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2024

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The two-dimensional material Cr2Ge2Te6 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 $T$$C$ 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. In conclusion, our findings reveal the sensitivity of the orbital-selective electronic structure for probing the dynamical evolution of local moment correlations in vdW insulating magnets.