Chin. Phys. Lett.  2014, Vol. 31 Issue (12): 127401    DOI: 10.1088/0256-307X/31/12/127401
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
High-Pressure Single-Crystal Neutron Scattering Study of Magnetic and Fe Vacancy Orders in (Tl,Rb)2Fe4Se5 Superconductor
YE Feng1,2, BAO Wei3**, CHI Song-Xue1, Antonio M. dos Santos1, Jamie J. Molaison1, FANG Ming-Hu4, WANG Hang-Dong4, MAO Qian-Hui4, WANG Jin-Chen3, LIU Juan-Juan3, SHENG Jie-Ming3
1Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge 37831, USA
2Department of Physics and Astronomy, University of Kentucky, Lexington 40506, USA
3Department of Physics, Renmin University of China, Beijing 100872
4Department of Physics, Zhejiang University, Hangzhou 310027
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YE Feng, BAO Wei, CHI Song-Xue et al  2014 Chin. Phys. Lett. 31 127401
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Abstract The magnetic and iron vacancy orders in superconducting (Tl,Rb)2Fe4Se5 single-crystals are investigated by using a high-pressure neutron diffraction technique. Similar to the temperature effect, the block antiferromagnetic order gradually decreases upon increasing pressure while the Fe vacancy superstructural order remains intact before its precipitous disappearance at the critical pressure Pc=8.3 GPa. Combined with previously determined Pc for superconductivity, our phase diagram under pressure reveals the concurrence of the block AFM order, the √5×√5 iron vacancy order and superconductivity for the 245 superconductor. A synthesis of current experimental data in a coherent physical picture is attempted.
Published: 12 January 2015
PACS:  74.62.Fj (Effects of pressure)  
  25.40.Dn (Elastic neutron scattering)  
  74.25.Ha (Magnetic properties including vortex structures and related phenomena)  
  74.70.-b (Superconducting materials other than cuprates)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/31/12/127401       OR      https://cpl.iphy.ac.cn/Y2014/V31/I12/127401
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YE Feng
BAO Wei
CHI Song-Xue
Antonio M. dos Santos
Jamie J. Molaison
FANG Ming-Hu
WANG Hang-Dong
MAO Qian-Hui
WANG Jin-Chen
LIU Juan-Juan
SHENG Jie-Ming
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