Photoinduced charge, spin, and orbital order in the two-orbital extended Hubbard model

Abstract: Nonequilibrium control of electronically ordered hidden phases may lead to the development of ultrafast switches and memory devices. In this study, we demonstrate tunable hidden orders in the half-filled photodoped two-orbital extended Hubbard model. Using steady-state nonequilibrium dynamical mean-field theory, we clarify the coexistence and interplay of nonthermal charge, spin, and orbital order. The hidden state at low effective temperature and sufficiently high photodoping is reminiscent of Kugel-Khomskii order in the two-orbital Hubbard model at 1/4 and 3/4 filling, but it emerges out of a nonequilibrium charge-ordered state and exhibits a different magnetic structure. A low-energy effective Hamiltonian is used to analyze the exchange processes that stabilize the nonthermal order.

This data base provides plotting script, data and/or data for

all the figures of the above publication (DOI: 10.1103/PhysRevB.110.214433)

The plotting script is written in MATLAB

Acknowledgements - This work has been supported by SNSF Grant No. 200021-196966. The NESS simulations are based on a code originally developed by J. Li and M. Eckstein. The calculations were run on the beo06 cluster at the University of Fribourg.

摘要：电子有序隐相的非平衡调控有望推动超快开关与存储器件的研发。本研究针对半填充光掺杂双轨道扩展哈伯德（Hubbard）模型，证实了可调谐隐序的存在。我们采用稳态非平衡动力学平均场理论（steady-state nonequilibrium Dynamical Mean-Field Theory），阐明了非热电荷序、自旋序与轨道序的共存及相互作用机制。在低有效温度与足够高光掺杂条件下出现的隐态，虽与1/4和3/4填充下双轨道哈伯德模型中的库格尔-霍姆斯基（Kugel-Khomskii）序相似，但其源自非平衡电荷有序态，且呈现出截然不同的磁结构。我们通过低能有效哈密顿量（Hamiltonian）分析了稳定该非热序的交换相互作用过程。

本数据集包含上述论文（DOI: 10.1103/PhysRevB.110.214433）所有配图的绘图脚本、数据及相关配套素材。该绘图脚本采用MATLAB语言编写。

致谢——本研究得到瑞士国家科学基金会（SNSF）项目编号200021-196966的资助。非平衡稳态（Non-Equilibrium Steady State, NESS）模拟基于J. Li与M. Eckstein最初开发的程序框架。所有计算均在弗里堡大学的beo06计算集群上完成。