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Chin. Phys. B, 2017, Vol. 26(7): 077401    DOI: 10.1088/1674-1056/26/7/077401
Special Issue: Virtual Special Topic — High temperature superconductivity
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Electronic structure of heavy fermion system CePt2In7 from angle-resolved photoemission spectroscopy

Bing Shen(沈兵)1,2, Li Yu(俞理)1, Kai Liu(刘凯)3, Shou-Peng Lyu(吕守鹏)1,2, Xiao-Wen Jia(贾小文)1,4, E D Bauer5, J D Thompson5, Yan Zhang(张艳)1,2, Chen-Lu Wang(王晨露)1,2, Cheng Hu(胡成)1,2, Ying Ding(丁颖)1,2, Xuan Sun(孙璇)1,2, Yong Hu(胡勇)1,2, Jing Liu(刘静)1,2, Qiang Gao(高强)1,2, Lin Zhao(赵林)1, Guo-Dong Liu(刘国东)1, Zu-Yan Xu(许祖彦)6, Chuang-Tian Chen(陈创天)6, Zhong-Yi Lu(卢仲毅)3, X J Zhou(周兴江)1,2,7
1 National Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China;
4 Military Transportation University, Tianjin 300161, China;
5 Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA;
6 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
7 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
Abstract  

We have carried out high-resolution angle-resolved photoemission measurements on the Ce-based heavy fermion compound CePt2In7 that exhibits stronger two-dimensional character than the prototypical heavy fermion system CeCoIn5. Multiple Fermi surface sheets and a complex band structure are clearly resolved. We have also performed detailed band structure calculations on CePt2In7. The good agreement found between our measurements and the calculations suggests that the band renormalization effect is rather weak in CePt2In7. A comparison of the common features of the electronic structure of CePt2In7 and CeCoIn5 indicates that CeCoIn5 shows a much stronger band renormalization effect than CePt2In7. These results provide new information for understanding the heavy fermion behaviors and unconventional superconductivity in Ce-based heavy fermion systems.

Keywords:  heavy fermion      ARPES      electronic structure      band calculation  
Received:  23 May 2017      Revised:  06 June 2017      Published:  05 July 2017
PACS:  74.70.Tx (Heavy-fermion superconductors)  
  74.25.Jb (Electronic structure (photoemission, etc.))  
  79.60.-i (Photoemission and photoelectron spectra)  
  71.20.-b (Electron density of states and band structure of crystalline solids)  
Fund: 

The ARPES experimental work is supported by the National Natural Science Foundation of China (Grant No.11574360),the National Basic Research Program of China (Grant Nos.2015CB921300,2013CB921700,and 2013CB921904),and the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No.XDB07020300).The calculation work is supported by the National Natural Science Foundation of China (Grant No.91421304),the Fundamental Research Funds for the Central Universities of China,and the Research Funds of Renmin University of China (Grant Nos.14XNLQ03 and 16XNLQ01).

Corresponding Authors:  Li Yu, Zhong-Yi Lu, X J Zhou     E-mail:  li.yu@iphy.ac.cn;zlu@ruc.edu.cn;XJZhou@aphy.iphy.ac.cn

Cite this article: 

Bing Shen(沈兵), Li Yu(俞理), Kai Liu(刘凯), Shou-Peng Lyu(吕守鹏), Xiao-Wen Jia(贾小文), E D Bauer, J D Thompson, Yan Zhang(张艳), Chen-Lu Wang(王晨露), Cheng Hu(胡成), Ying Ding(丁颖), Xuan Sun(孙璇), Yong Hu(胡勇), Jing Liu(刘静), Qiang Gao(高强), Lin Zhao(赵林), Guo-Dong Liu(刘国东), Zu-Yan Xu(许祖彦), Chuang-Tian Chen(陈创天), Zhong-Yi Lu(卢仲毅), X J Zhou(周兴江) Electronic structure of heavy fermion system CePt2In7 from angle-resolved photoemission spectroscopy 2017 Chin. Phys. B 26 077401

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