CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
|
|
|
|
Electronic Structure Reconstruction across the Antiferromagnetic Transition in TaFe1.23Te3 Spin Ladder |
XU Min1, WANG Li-Min2, PENG Rui1,7, GE Qing-Qin1, CHEN Fei1, YE Zi-Rong1, ZHANG Yan1, CHEN Su-Di1, XIA Miao1, LIU Rong-Hua3, Arita M.4, Shimada K.4, Namatame H.4, Taniguchi M.4, Matsunami M.5, Kimura S.5, SHI Ming6, CHEN Xian-Hui3, YIN Wei-Guo2, KU Wei2**, XIE Bin-Ping1,7**, FENG Dong-Lai1,7** |
1State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433
2Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, New York 11973, USA
3Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026
4Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
5UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
6Swiss Light Source, Paul-Scherrer Institute, Villigen 5232, Switzerland
7Collaborative Innovation Center of Advanced Microstructures, 22 Hankou Road, Gulou, Nanjing 210093 |
|
Cite this article: |
XU Min, WANG Li-Min, PENG Rui et al 2015 Chin. Phys. Lett. 32 027401 |
|
|
Abstract 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.
|
|
Published: 20 January 2015
|
|
PACS: |
74.25.Jb
|
(Electronic structure (photoemission, etc.))
|
|
71.20.-b
|
(Electron density of states and band structure of crystalline solids)
|
|
74.70.-b
|
(Superconducting materials other than cuprates)
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|