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Magnetic phases for strongly correlatedt2g4electrons on the square lattice: Impact of spin-orbit coupling and crystal field
Physical Review B ( IF 3.2 ) Pub Date : 2021-09-23 , DOI: 10.1103/physrevb.104.115148
Pascal Strobel 1 , Friedemann Aust 1 , Maria Daghofer 1, 2
Affiliation  

We investigate two holes in the t2g levels of a square-lattice Mott insulator with strong spin-orbit coupling. Exact diagonalization of a spin-orbital model, with arbitrary spin-orbit coupling and crystal field (valid for strong onsite interactions) is complemented by an effective triplon model (valid for strong spin-orbit coupling) and by a semiclassical Monte Carlo variant of the model. We provide the magnetic phase diagram depending on crystal field and spin-orbit coupling, which largely agrees for the semiclassical Monte Carlo and quantum models, as well as excitation spectra characterizing the various phases.

中文翻译:

方形晶格上强相关 t2g4 电子的磁相:自旋轨道耦合和晶体场的影响

我们调查了两个洞 2G具有强自旋轨道耦合的方格莫特绝缘体的水平。具有任意自旋轨道耦合和晶体场(对强现场相互作用有效)的自旋轨道模型的精确对角化由有效的三元模型(对强自旋轨道耦合有效)和半经典蒙特卡罗变体补充模型。我们提供了取决于晶体场和自旋轨道耦合的磁相图,这与半经典蒙特卡罗和量子模型以及表征各种相的激发光谱大体一致。
更新日期:2021-09-23
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