Electronic Structure Reconstruction across the Antiferromagnetic Transition in TaFe1.23Te3 Spin Ladder. (1st February 2015)

• Record Type: Journal Article
• Authors: Xu, Min; Wang, Li-Min; Peng, Rui; Ge, Qing-Qin; Chen, Fei; Ye, Zi-Rong; Zhang, Yan; Chen, Su-Di; Xia, Miao; Liu, Rong-Hua; Shi, Ming; Chen, Xian-Hui; Yin, Wei-Guo; Ku, Wei; Xie, Bin-Ping; Feng, Dong-Lai; M., Arita; K., Shimada; H., Namatame; M., Taniguchi; M., Matsunami; S., Kimura
• Is Part Of: Chinese physics letters. Volume 32:Number 2(2015:Feb.)
• Page Start: 027401
• Publication Date: 2015-02-01
• Subjects: Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1088/0256-307X/32/2/027401
• Languages: English
• ISSNs: 0256-307X

Abstract

<abstract xml:lang="en"> <title>Abstract</title> <p>Employing the angle-resolved photoemission spectroscopy we study the electronic structure of TaFe_1.23Te₃, 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 TaFe_1.23Te₃ serves as a simpler platform that contains similar ingredients to the parent compounds of iron-based superconductors.</p> </abstract>