Competition between BCS superconductivity and ferromagnetic spin fluctuations in MgCNi3

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	Competition between BCS superconductivity and ferromagnetic spin fluctuations in MgCNi3
	Shan, L ; Liu, ZY ; Ren, ZA ; Che, GC ; Wen, HH
刊名	PHYSICAL REVIEW B
	2005
卷号	71 期号:14
关键词	DENSITY-OF-STATES D-WAVE SUPERCONDUCTORS HEAT FIELD YBA2CU3O7-DELTA VORTEX 0-LESS-THAN-OR-EQUAL-TO-DELTA-LESS-THAN-OR-EQUAL-TO-0.2 DEPENDENCE METALS
ISSN号	1098-0121
通讯作者	Shan, L: Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100080, Peoples R China.
中文摘要	The low temperature specific heat of the superconductor MgCNi3 and a nonsuperconductor MgC0.85Ni3 is investigated in detail. An additional contribution is observed from the data of MgCNi3 but absent in MgC0.85Ni3, which is demonstrated to be insensitive to the applied magnetic field even up to 12 T. A detailed discussion on its origin is then presented. By subtracting this additional contribution, the zero field specific heat of MgCNi3 can be well described by the BCS theory with the gap ratio (Delta/k(B)T(c)) determined by the previous tunneling measurements. The conventional s-wave pairing state is further proved by the magnetic field dependence of the specific heat at low temperatures and the behavior of the upper critical field.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/34975]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Shan, L,Liu, ZY,Ren, ZA,et al. Competition between BCS superconductivity and ferromagnetic spin fluctuations in MgCNi3[J]. PHYSICAL REVIEW B,2005,71(14).
APA	Shan, L,Liu, ZY,Ren, ZA,Che, GC,&Wen, HH.(2005).Competition between BCS superconductivity and ferromagnetic spin fluctuations in MgCNi3.PHYSICAL REVIEW B,71(14).
MLA	Shan, L,et al."Competition between BCS superconductivity and ferromagnetic spin fluctuations in MgCNi3".PHYSICAL REVIEW B 71.14(2005).