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Magnetic stability, Fermi surface topology, and spin-correlated dielectric response in monolayer 1T-CrTe2
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2024-11-05 , DOI: 10.1039/d4cp02724h Ahmed Elrashidy, Jia-An Yan
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2024-11-05 , DOI: 10.1039/d4cp02724h Ahmed Elrashidy, Jia-An Yan
We have carried out density-functional theory (DFT) calculations to study the magnetic stability of both ferromagnetic (FM) and anti-ferromagnetic (AFM) states in monolayer 1T-CrTe2. Our results show that the AFM order is lower in energy and thus is the ground state. By tuning the lattice parameters, the AFM order can transition to the FM order, in good agreement with experimental observation. We observe a commensurate spin density wave (SDW) alongside the previously predicted charge density wave (CDW), and attribute the AFM order to the SDW. The SDW order leads to distinct hole and electron Fermi pockets and a pronounced optical anisotropy, suggesting quasi-one-dimensional behavior in this material.
中文翻译:
单层 1T-CrTe2 中的磁稳定性、费米表面拓扑和自旋相关介电响应
我们进行了密度泛函理论 (DFT) 计算,以研究单层 1T-CrTe2 中铁磁 (FM) 和反铁磁 (AFM) 状态的磁稳定性。我们的结果表明,AFM 阶的能量较低,因此是基态。通过调整晶格参数,AFM 级可以转换为 FM 级,与实验观察非常一致。我们观察到一个相称的自旋密度波 (SDW) 以及先前预测的电荷密度波 (CDW),并将 AFM 阶次归因于 SDW。SDW 级导致不同的空穴和电子费米袋以及明显的光学各向异性,表明这种材料存在准一维行为。
更新日期:2024-11-05
中文翻译:
单层 1T-CrTe2 中的磁稳定性、费米表面拓扑和自旋相关介电响应
我们进行了密度泛函理论 (DFT) 计算,以研究单层 1T-CrTe2 中铁磁 (FM) 和反铁磁 (AFM) 状态的磁稳定性。我们的结果表明,AFM 阶的能量较低,因此是基态。通过调整晶格参数,AFM 级可以转换为 FM 级,与实验观察非常一致。我们观察到一个相称的自旋密度波 (SDW) 以及先前预测的电荷密度波 (CDW),并将 AFM 阶次归因于 SDW。SDW 级导致不同的空穴和电子费米袋以及明显的光学各向异性,表明这种材料存在准一维行为。