Acoustic characteristics of FeSe single crystals

被引：20
|
作者：
Zvyagina, G. A. [1 ]
Gaydamak, T. N. [1 ]
Zhekov, K. R. [1 ]
Bilich, I. V. [1 ]
Fil, V. D. [1 ]
Chareev, D. A. [2 ]
Vasiliev, A. N. [3 ]
机构：
[1] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[2] Inst Expt Mineral, Chernogolovka 142432, Moscow Region, Russia
[3] Moscow MV Lomonosov State Univ, Low Temp Phys & Superconduct Dept, Moscow 119991, Russia
来源：
EPL | 2013年 / 101卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1209/0295-5075/101/56005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The results of the comprehensive ultrasonic research of high-quality single crystals of FeSe are presented. Absolute values of sound velocities and their temperature dependences were measured; elastic constants and Debye temperature were calculated. The elastic C-11-C-12 and C-11 constants undergo significant softening under the structural tetra-ortho transformation. The significant influence of the superconducting transition on the velocity and attenuation of sound was revealed and the value of the superconducting energy gap was estimated. Copyright (C) EPLA, 2013
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页数：5
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