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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; Marchetti, PA (reprint author), Ist Nazl Fis Nucl, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
2011
发表期刊EPL
ISSN0295-5075
卷号93期号:5页码:57008
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
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
关键词T-j Model High-temperature Superconductivity Valence Bond State Antiferromagnet La2cuo4 Physics Plasma Phase Holes
学科领域Physics
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收录类别SCI
语种英语
WOS记录号WOS:000288322900020
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14399
专题理论物理所SCI论文
通讯作者Marchetti, PA (reprint author), Ist Nazl Fis Nucl, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
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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.
APA Marchetti, PA,Ye, F,Su, ZB,Yu, L,&Marchetti, PA .(2011).A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices.EPL,93(5),57008.
MLA Marchetti, PA,et al."A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices".EPL 93.5(2011):57008.
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