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
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.
. [J]. 中国物理快报, 2014, 31(12): 127401-127401.
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. High-Pressure Single-Crystal Neutron Scattering Study of Magnetic and Fe Vacancy Orders in (Tl,Rb)2Fe4Se5 Superconductor. Chin. Phys. Lett., 2014, 31(12): 127401-127401.
2014, Vol. 31 
