Intrinsic Josephson junctions in the iron-based multi-band superconductor (V2Sr4O6)Fe2As2

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	Intrinsic Josephson junctions in the iron-based multi-band superconductor (V2Sr4O6)Fe2As2
	Moll, PJW ; Zhu, XY ; Cheng, P ; Wen, HH ; Batlogg, B
刊名	NATURE PHYSICS
	2014
卷号	10 期号:9 页码:644
ISSN号	1745-2473
通讯作者	Moll, PJW (reprint author), ETH, CH-8093 Zurich, Switzerland.
中文摘要	In layered superconductors, Josephson junctions may be formed within the unit cell(1-3) as a result of sufficiently low inter-layer coupling. These intrinsic Josephson junction (iJJ) systems(4) have attracted considerable interest for their application potential in quantum computing as well as efficient sources of THz radiation, closing the famous 'THz gap'(5). So far, iJJ have been demonstrated in single-band, copper-based high-T-c superconductors, mainly in Bi-Sr-Ca-Cu-O (refs 6-8). Here we report clear experimental evidence for iJJ behaviour in the iron-based superconductor (V2Sr4O6)Fe2As2. The intrinsic junctions are identified by periodic oscillations of the flux-flow voltage on increasing a well-aligned in-plane magnetic field(9). The periodicity is explained by commensurability effects between the Josephson vortex lattice and the crystal structure, which is a hallmark signature of Josephson vortices confined into iJJ stacks(10,11). This finding adds the pnictide (V2Sr4O6)Fe2As2 to the copper-based iJJ materials of interest for Josephson junction applications. In particular, novel devices based on multi-band Josephson coupling may be realized.
资助信息	Ministry of Science and Technology of China [2011CBA00102, 2010CB923002]; EMEZ; ScopeM at ETH Zurich
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59394]
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	Moll, PJW,Zhu, XY,Cheng, P,et al. Intrinsic Josephson junctions in the iron-based multi-band superconductor (V2Sr4O6)Fe2As2[J]. NATURE PHYSICS,2014,10(9):644.
APA	Moll, PJW,Zhu, XY,Cheng, P,Wen, HH,&Batlogg, B.(2014).Intrinsic Josephson junctions in the iron-based multi-band superconductor (V2Sr4O6)Fe2As2.NATURE PHYSICS,10(9),644.
MLA	Moll, PJW,et al."Intrinsic Josephson junctions in the iron-based multi-band superconductor (V2Sr4O6)Fe2As2".NATURE PHYSICS 10.9(2014):644.