| 三元超导化合物Sc_5Ir_4Si_(10)的低温比热性质 |
| |
| 引用本文： | 顾冬梅,王智河,于广亮,邱里,施智祥. 三元超导化合物Sc_5Ir_4Si_(10)的低温比热性质[J]. 稀有金属材料与工程, 2008, 0(Z4) |
| |
| 作者姓名： | 顾冬梅 王智河 于广亮 邱里 施智祥 |
| |
| 作者单位： | 南京大学物理系;东南大学物理系; |
| |
| 摘 要： | 在零场下2～300K以及不同磁场下2～10K温度范围内,分别测量了超导Sc5Ir4Si10单晶的比热。采用4-Einstein峰拟合声子谱的方法对高温部分进行处理,成功地分离了Sc5Ir4Si10的晶格比热和电子比热。10K以下的比热遵守经典的超导理论,即晶格比热与温度的三次方成正比,电子比热符合温度的幂指数关系。4K以下电子比热的磁场关系为ΔCe/T∝Hα,其中α与温度有关。随着温度的降低α的值从0.67增大到0.76,表明Sc5Ir4Si10的超导配对可能是s波和d波混合波,并由d波向s波转化。
|
| 关 键 词： | Sc5Ir4Si10单晶 比热 超导电子配对机制 |
Characteristics of Low Temperature Specific Heat in Superconducting Sc_5Ir_4Si_(10) Single Crystal |
| |
| Gu Dongmei,,Wang Zhihe,Yu Guangliang,Qiu Li,Shi Zhixiang. Characteristics of Low Temperature Specific Heat in Superconducting Sc_5Ir_4Si_(10) Single Crystal[J]. Rare Metal Materials and Engineering, 2008, 0(Z4) |
| |
| Authors: | Gu Dongmei Wang Zhihe Yu Guangliang Qiu Li Shi Zhixiang |
| |
| Affiliation: | Gu Dongmei1,2,Wang Zhihe1,Yu Guangliang1,Qiu Li1,Shi Zhixiang2 (1. Nanjing University,Nanjing 210093,China) (2. Southeast University,Nanjing 210096,China) |
| |
| Abstract: | Specific heat of superconducting Sc5Ir4Si10 single crystal has been measured by relaxation technique from 2 K to 300 K at 0 T and from 2 K to 10K in various fields, respectively. The electronic and lattice specific heats were separated successfully by fitting the phonon spectrum in high temperature region using the 4 Einstein peaks. It is found that the specific heat below 10 K follows the classical Bardeen-Cooper-Schreiffer (BCS) theory, namely, the lattice contribution is proportional to the cube of tempe... |
| |
| Keywords: | Sc5Ir4Si10 single crystal specific heat superconducting electron pairing mechanism |
| 本文献已被 CNKI 等数据库收录！ |
|
