A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices

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	A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices
	Marchetti, PA ; Ye, F ; Su, ZB ; Yu, L
刊名	EPL
	2011
卷号	93 期号:5
关键词	T-J MODEL HIGH-TEMPERATURE SUPERCONDUCTIVITY VALENCE BOND STATE ANTIFERROMAGNET LA2CUO4 PHYSICS PLASMA PHASE HOLES
ISSN号	0295-5075
通讯作者	Marchetti, PA: Ist Nazl Fis Nucl, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
中文摘要	We propose a non-BCS mechanism for superconductivity in hole-underdoped cuprates based on a gauge approach to the t-J model. The gluing force is an attraction between spin vortices centered on the empty sites of two opposite Neel sublattices, leading to pairing of charge carriers. In the presence of these pairs, a gauge force coming from the single occupancy constraint induces, in turn, the pairing of the spin carriers. The combination of the charge and spin pairs gives rise to a finite density of incoherent hole pairs, leading to a finite Nernst signal as precursor to superconductivity. The true superconducting transition occurs at an even lower temperature, via a 3D XY-type transition. The main features of this non-BCS description of superconductivity are consistent with the experimental results in underdoped cuprates, especially the contour plot of the Nernst signal. Copyright (c) EPLA, 2011
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/311004/33112]
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	Marchetti, PA,Ye, F,Su, ZB,et al. A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices[J]. EPL,2011,93(5).
APA	Marchetti, PA,Ye, F,Su, ZB,&Yu, L.(2011).A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices.EPL,93(5).
MLA	Marchetti, PA,et al."A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices".EPL 93.5(2011).