Single crystal growth and characterization of tetragonal FeSe1-x superconductors

被引：139

作者：

Chareev, Dmitriy ^{[1
]}

Osadchii, Evgeniy ^{[1
]}

Kuzmicheva, Tatiana ^{[2
]}

Lin, Jiunn-Yuan ^{[3
]}

Kuzmichev, Svetoslav ^{[4
]}

Volkova, Olga ^{[4
]}

Vasiliev, Alexander ^{[4
]}

机构：

[1] Russian Acad Sci, Inst Expt Mineral, Chernogolovka 142432, Moscow District, Russia

[2] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia

[3] Natl Chiao Tung Univ, Inst Phys, Hsinchu 300, Taiwan

[4] Moscow MV Lomonosov State Univ, Low Temp Phys & Superconduct Dept, Moscow 119991, Russia

来源：

CRYSTENGCOMM | 2013年 / 15卷 / 10期

基金：

俄罗斯基础研究基金会;

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY;

D O I：

10.1039/c2ce26857d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The plate-like single crystals of tetragonal (P4/nmm) FeSe1-x superconductors were grown using the KCl-AlCl3 flux technique which produced single crystalline tetragonal samples of about 4 x 4 x 0.1 mm(3) dimensions. The energy dispersive X-ray spectroscopy established a ratio of Fe : Se = 1 : 0.96 +/- 0.02. The resistivity and magnetization measurements revealed a sharp superconducting transition at T-c = 9.4 K. Multiple Andreev reflections spectroscopy pointed to the existence of two-gap superconductivity with the gap values Delta(L) = 2.4 +/- 0.2 meV and Delta(S) = 0.75 +/- 0.1 meV at 4.2 K.

引用

页码：1989 / 1993

页数：5

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