Electronic Structure Reconstruction across the Antiferromagnetic Transition in TaFe1.23Te3 Spin Ladder

作     者：徐敏 王莉敏 彭瑞 葛青亲 陈飞 叶子荣 张焱 陈苏迪 夏淼 刘荣华 Arita M. Shimada K. Namatame H. Taniguchi M. Matsunami M. Kimura S. 史明 陈仙辉 尹卫国 顾威 谢斌平 封东来 

作者机构：State Key Laboratory of Surface PhysicsDepartment of Physicsand Advanced Materials LaboratoryFudan University Condensed Matter Physics and Materials Science DepartmentBrookhaven National Laboratory Collaborative Innovation Center of Advanced Microstructures Hefei National Laboratory for Physical Sciences at Microscale and Department of PhysicsUniversity of Science and Technology of China Hiroshima Synchrotron Radiation CenterHiroshima University UVSOR FacilityInstitute for Molecular Science Swiss Light SourcePaul-Scherrer Institute 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2015年第32卷第2期

页      面：127-130页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the National Basic Research Program of China under Grant Nos 2012CB921400 2011CB921802 and 2011CBA00112 

主　　题：Ta der Electronic Structure Reconstruction across the Antiferromagnetic Transition in TaFe AFM 

摘      要：Employing the angle-resolved photoemission spectroscopy, we study the electronic structure of TaFe1.23Te3, a two-leg spin ladder compound with a novel antiferromagnetic ground state. Quasi-two-dimensional （2D） Fermi surface is observed, with sizable inter-ladder hopping. Moreover, instead of observing an energy gap at the Fermi surface in the antiferromagnetic state, we observe the shifts of various bands. Combining these observations with density-functional-theory calculations, we propose that the large scale reconstruction of the electronic structure, caused by the interactions between the coexisting itinerant electrons and local moments, is most likely the driving force of the magnetic transition. Thus TaFe1.23Te3 serves as a simpler platform that contains similar ingredients to the parent compounds of iron-based superconductors.