Interrelation of superconductivity and magnetism in FeSe1-xTex compounds. Pressure effects

被引：7
作者：
Panfilov, A. S. [1 ]
Pashchenko, V. A. [1 ]
Grechnev, G. E. [1 ]
Desnenko, V. A. [1 ]
Fedorchenko, A. V. [1 ]
Bludov, A. N. [1 ]
Gnatchenko, S. L. [1 ]
Chareev, D. A. [2 ]
Mitrofanova, E. S. [3 ]
Vasiliev, A. N. [3 ,4 ]
机构：
[1] BI Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[2] Russian Acad Sci, Inst Expt Mineral, Chernogolovka 142432, Russia
[3] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia
[4] Urals Fed Univ, Dept Theoret Phys & Appl Math, Ekaterinburg 620002, Russia
来源：
LOW TEMPERATURE PHYSICS | 2014年 / 40卷 / 07期
关键词：
D O I：
10.1063/1.4890990
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effect of isotropic pressures P up to 5 kbar on the superconducting transition temperature T-c of the FeSe1-xTex system ( x = 0, 0.85, 0.88, 0.90) is studied. For the first time, a change in the sign of the effect of pressure on T-c on going from FeSe to the tellurium-rich alloys is observed. This makes it possible to specify more precisely the form of the dependence of the pressure derivative dT(c)/dP on composition in this system. This dependence is compared with first principles calculations of the electron structure and magnetism of FeSe, FeTe, and FeSe0.5Te0.5 as functions of pressure, as well as with our earlier experimental data on the effect of pressure on the magnetic susceptibility of the normal state in FeSe and FeTe. This comparison is indicative of a competitive interrelationship between superconductivity and magnetism in tellurium rich FeSe1-xTex compounds. (C) 2014 AIP Publishing LLC.
引用
收藏
页码：615 / 620
页数：6
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