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	Bosonic resonating valence bond wave function for doped Mott insulators
	Weng, ZY ; Zhou, Y ; Muthukumar, VN
	2010-05-06 ; 2010-05-06
关键词	T-J MODEL MEAN-FIELD-THEORY ANTIFERROMAGNETIC HEISENBERG-MODEL SQUARE-LATTICE SUPERCONDUCTIVITY SYSTEMS STATE Physics, Condensed Matter
中文摘要	We propose a class of ground states for doped Mott insulators in the electron second quantization representation. They are obtained from a bosonic resonating valence bond (RVB) theory of the t-J model. At half filling, the ground state describes spin correlations of the S=1/2 Heisenberg model very accurately. Its spin degrees of freedom are characterized by RVB pairing of spins, the size of which decreases continuously as holes are doped into the system. Charge degrees of freedom emerge upon doping and are described by twisted holes in the RVB background. We show that the twisted holes exhibit an off diagonal long range order (ODLRO) in the pseudogap ground state, which has a finite pairing amplitude, but is short of phase coherence. Unpaired spins in such a pseudogap ground state behave as free vortices, preventing superconducting phase coherence. The existence of nodal quasiparticles is also ensured by such a hidden ODLRO in the ground state, which is non-Fermi liquidlike in the absence of superconducting phase coherence. Two distinct types of spin excitations can also be constructed. The superconducting instability of the pseudogap ground state is discussed and a d-wave superconducting ground state is obtained. This class of pseudogap and superconducting ground states unifies antiferromagnetism, pseudogap, superconductivity, and Mott physics into a new state of matter.
语种	英语 ; 英语
出版者	AMERICAN PHYSICAL SOC ; COLLEGE PK ; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/14829]
专题	清华大学
推荐引用方式 GB/T 7714	Weng, ZY,Zhou, Y,Muthukumar, VN. Bosonic resonating valence bond wave function for doped Mott insulators[J],2010, 2010.
APA	Weng, ZY,Zhou, Y,&Muthukumar, VN.(2010).Bosonic resonating valence bond wave function for doped Mott insulators..
MLA	Weng, ZY,et al."Bosonic resonating valence bond wave function for doped Mott insulators".(2010).

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