Spectrum of the Hole Excitation in Spin-Orbit Mott Insulator Na_(2)IrO_(3)  

作　　者：王巍 董召阳 于顺利 李建新 Wei Wang;Zhao-Yang Dong;Shun-Li Yu;Jian-Xin Li(School of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;Department of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China;National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China;Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China)

机构地区：[1]School of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]Department of Applied Physics,Nanjing University of Science and Technology,Nanjing 210094,China [3]National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China [4]Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Physics Letters》2023年第8期63-67,共5页中国物理快报（英文版）

基　　金：supported by the National Key Projects for Research and Development of China(Grant No.2021YFA1400400);the National Natural Science Foundation of China(Grant Nos.12004191,92165205,12074175);the Natural Science Foundation of Jiangsu Province(Grant No.BK20200738);the Natural Science Research Start-up Foundation of Posts and Telecommunications(Grant No.NY220095)。

摘　　要：We study the motion of a hole with internal degrees of freedom,introduced to the zigzag magnetic ground state of Na_(2)IrO_(3),by using the self-consistent Born approximation.We find that the low-,intermediate-,and high-energy spectra are primarily attributed to the singlet,triplet,and quintet hole contributions,respectively.The spectral functions exhibit distinct features such as the electron-like dispersion of low-energy states near the L point,the maximum M-point intensity of mid-energy states,and the hole-like dispersion of high-energy states.These features are robust and almost insensitive to the exchange model and Hund's coupling,and are in qualitative agreement with the angular-resolved photoemission spectra observed in Na_(2)IrO_(3).Our results reveal that the interference between internal degrees of freedom in different sublattices plays an important role in inducing the complex dispersions.

关 键 词：DISPERSION SPECTRA qualitative 

分 类 号：O469[理学—凝聚态物理]