Theory of Gossamer and resonating valence bond superconductivity

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	Theory of Gossamer and resonating valence bond superconductivity
	Gan, JY; Zhang, FC; Su, ZB; Gan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
刊名	PHYSICAL REVIEW B
	2005
卷号	71 期号:1 页码:-
关键词	T-j Model Variational Monte-carlo High-temperature Superconductors D-wave Superconductivity Hubbard-model Cuprate Superconductors Organic Superconductors Gap Anisotropy Mean-field Symmetry
ISSN号	1098-0121
英文摘要	We use an effective Hamiltonian for two-dimensional Hubbard model including an antiferromagnetic spin-spin coupling term to study recently proposed Gossamer superconductivity. We apply a renormalized mean field theory to approximately take into account the strong correlation effect in partially projected Gutzwiller wave functions. At the half-filling, there is a first order phase transition to separate a Mott insulator at large Coulomb repulsion U from a Gossamer superconductor at small U. At the critical value U=U-c, the charge carrier density and the superconducting (SC) order parameter change discontinuously from zero in the Mott insulating phase to finite values in the Gossamer SC phase. The first order transition is due to the interplay of the kinetic and spin exchange energies. As the electron density changes away from half-filling, the Gossamer SC state changes smoothly, while the Mott insulator is evolved into a resonating valence bond (RVB) SC state. The Gossamer and RVB SC states have the same pairing symmetry. The SC order parameter changes smoothly from a RVB SC state at U>U-c to a Gossamer SC state at U
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000226735100134
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13915]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Gan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Gan, JY,Zhang, FC,Su, ZB,et al. Theory of Gossamer and resonating valence bond superconductivity[J]. PHYSICAL REVIEW B,2005,71(1):-.
APA	Gan, JY,Zhang, FC,Su, ZB,&Gan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2005).Theory of Gossamer and resonating valence bond superconductivity.PHYSICAL REVIEW B,71(1),-.
MLA	Gan, JY,et al."Theory of Gossamer and resonating valence bond superconductivity".PHYSICAL REVIEW B 71.1(2005):-.