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题名: A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices
作者: Marchetti, PA ;  Ye, F ;  Su, ZB ;  Yu, L
刊名: EPL
出版日期: 2011
卷号: 93, 期号:5, 页码:57008
关键词: T-J MODEL ;  HIGH-TEMPERATURE SUPERCONDUCTIVITY ;  VALENCE BOND STATE ;  ANTIFERROMAGNET ;  LA2CUO4 ;  PHYSICS ;  PLASMA ;  PHASE ;  HOLES
学科分类: Physics
通讯作者: Marchetti, PA (reprint author), Ist Nazl Fis Nucl, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
部门归属: [Marchetti, P. A.] Ist Nazl Fis Nucl, Dipartimento Fis G Galilei, I-35131 Padua, Italy; [Ye, F.] Chinese Acad Sci, Grad Univ, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China; [Su, Z. B.; Yu, L.] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Yu, L.] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
英文摘要: 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
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000288322900020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14399
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
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):57008.
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