Copper-doped AlN polycrystalline powders: A class of room-temperature ferromagnetic materials

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	Copper-doped AlN polycrystalline powders: A class of room-temperature ferromagnetic materials
	Li, H ; Chen, XL ; Song, B ; Bao, HQ ; Wang, WJ
刊名	SOLID STATE COMMUNICATIONS
	2011
卷号	151 期号:6 页码:499
关键词	MN SEMICONDUCTORS SPINTRONICS
ISSN号	0038-1098
通讯作者	Chen, XL: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100190, Peoples R China.
中文摘要	The iron-pnictide superconductors have a layered structure formed by stacks of FeAs planes from which the superconductivity originates. Given the multiband and quasi three-dimensional(1) (3D) electronic structure of these high-temperature superconductors, knowledge of the quasi-3D superconducting (SC) gap is essential for understanding the superconducting mechanism. By using the k(z) capability of angle-resolved photoemission, we completely determined the SC gap on all five Fermi surfaces (FSs) in three dimensions on Ba0.6K0.4Fe2As2 samples. We found a marked kz dispersion of the SC gap, which can derive only from interlayer pairing. Remarkably, the SC energy gaps can be described by a single 3D gap function with two energy scales characterizing the strengths of intralayer Delta(1) and interlayer Delta(2) pairing. The anisotropy ratio Delta(1)/Delta(2), determined from the gap function, is close to the c-axis anisotropy ratio of the magnetic exchange coupling J(c)/J(ab) in the parent compound(2). The ubiquitous gap function for all the 3D FSs reveals that pairing is short-ranged and strongly constrains the possible pairing force in the pnictides. A suitable candidate could arise from short-range antiferromagnetic fluctuations.
收录类别	SCI
资助信息	The International Centre for Diffraction Data, ICDD, USA; National Natural Science Foundation of China [50472075, 59972040, 50702073, 59925206, 50772012]; "863" program [2006AA03A107]; "973" program [2007CB936300]
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/311004/35189]
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	Li, H,Chen, XL,Song, B,et al. Copper-doped AlN polycrystalline powders: A class of room-temperature ferromagnetic materials[J]. SOLID STATE COMMUNICATIONS,2011,151(6):499.
APA	Li, H,Chen, XL,Song, B,Bao, HQ,&Wang, WJ.(2011).Copper-doped AlN polycrystalline powders: A class of room-temperature ferromagnetic materials.SOLID STATE COMMUNICATIONS,151(6),499.
MLA	Li, H,et al."Copper-doped AlN polycrystalline powders: A class of room-temperature ferromagnetic materials".SOLID STATE COMMUNICATIONS 151.6(2011):499.