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	The upper critical field and its anisotropy in (li1?xfex)ohfe1?yse
	Wang,Zhaosheng1; Yuan,Jie2; Wosnitza,J1; Zhou,Huaxue2; Huang,Yulong2; Jin,Kui2; Zhou,Fang2; Dong,Xiaoli2; Zhao,Zhongxian2
刊名	Journal of physics: condensed matter
	2016-11-14
卷号	29期号:2
关键词	Fe-based superconductor Upper critical field Anisotropy
ISSN号	0953-8984
DOI	10.1088/0953-8984/29/2/025701
英文摘要	Abstract the temperature dependence of the upper critical field (hc2) in a (li1?xfex)ohfe1?yse single crystal (tc≈40 k) has been determined by means of magnetotransport measurements down to 1.4?k both for inter-plane (h∥c, hc2//c) and in-plane (h∥ab, hc2//ab) field directions in static magnetic fields up to 14 t and pulsed magnetic fields up to 70 t. hc2//c exhibits a quasilinear increase with decreasing temperature below the superconducting transition and can be described well by an effective two-band model with unbalanced diffusivity, while hc2//ab shows a flattening below 35?k and follows the werthamer–helfand–hohenberg (whh) model incorporating orbital pair-breaking and spin-paramagnetic effects, yielding zero-temperature critical fields of hc2//c(0)≈67 t and hc2//ab(0)≈98 t. the anisotropy of the upper critical fields, γ(t)=hc2//ab/hc2//c monotonically decreases with decreasing temperature from about 7 near tc to 1.5 at 0?k. this reduced anisotropy, observed in most fe-based superconductors, is caused by the pauli limitation of hc2//ab.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0953-8984-29-2-025701
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373537
专题	物理研究所
作者单位	1.Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany 2.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
推荐引用方式 GB/T 7714	Wang,Zhaosheng,Yuan,Jie,Wosnitza,J,et al. The upper critical field and its anisotropy in (li1?xfex)ohfe1?yse[J]. Journal of physics: condensed matter,2016,29(2).
APA	Wang,Zhaosheng.,Yuan,Jie.,Wosnitza,J.,Zhou,Huaxue.,Huang,Yulong.,...&Zhao,Zhongxian.(2016).The upper critical field and its anisotropy in (li1?xfex)ohfe1?yse.Journal of physics: condensed matter,29(2).
MLA	Wang,Zhaosheng,et al."The upper critical field and its anisotropy in (li1?xfex)ohfe1?yse".Journal of physics: condensed matter 29.2(2016).

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