A Field-Directional Specific Heat Study on the Gap Structure of Overdoped Ba(Fe1-xCox)(2)As-2

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	A Field-Directional Specific Heat Study on the Gap Structure of Overdoped Ba(Fe1-xCox)(2)As-2
	Mu, G ; Tang, J ; Tanabe, Y ; Xu, J ; Zeng, B ; Shen, B ; Han, F ; Wen, HH ; Heguri, S ; Tanigaki, K
刊名	JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
	2013
卷号	82 期号:5
关键词	Fe-based superconductors gap structure specific heat Ba(Fe1-xCox)(2)As-2 line nodes
ISSN号	0031-9015
通讯作者	Mu, G (reprint author), Tohoku Univ, Grad Sch Sci, Dept Phys, Sendai, Miyagi 9808578, Japan.
中文摘要	Low-temperature specific heat is measured on the overdoped Ba(Fe1-xCox)(2)As-2 (x = 0.13) single crystal under magnetic fields along three different directions. A clear anisotropy is observed on the field dependent electronic specific heat coefficient gamma(H). The value of gamma(H) is obviously larger with magnetic field along [001] (c-axis) than that within the ab-plane of the crystal lattice, which cannot be attributed to the effect by anisotropy of the upper critical field. Meanwhile, the data show a rather small difference when the direction of the field is rotated from [100] to [110] direction within the ab-plane. Our results suggest that a considerable part of the line nodes is not excited to contribute to the quasiparticle density of states by the field when the field is within the ab-plane. The constraints on the topology of the gap nodes are discussed based on our observations.
资助信息	Scientific Research on Priority Areas of New Materials Science Using Regulated Nano Spaces; Ministry of Education, Science, Sports and Culture; Tohoku GCOE Program; Knowledge Innovation Project of Chinese Academy of Sciences [KJCX2-EW-W11]; Japan Society for the Promotion of Science (JSPS) [P10026]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/56720]
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	Mu, G,Tang, J,Tanabe, Y,et al. A Field-Directional Specific Heat Study on the Gap Structure of Overdoped Ba(Fe1-xCox)(2)As-2[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN,2013,82(5).
APA	Mu, G.,Tang, J.,Tanabe, Y.,Xu, J.,Zeng, B.,...&Tanigaki, K.(2013).A Field-Directional Specific Heat Study on the Gap Structure of Overdoped Ba(Fe1-xCox)(2)As-2.JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN,82(5).
MLA	Mu, G,et al."A Field-Directional Specific Heat Study on the Gap Structure of Overdoped Ba(Fe1-xCox)(2)As-2".JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 82.5(2013).