Spin-charge gauge theory of "pseudogap": Theory versus experiments

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	Spin-charge gauge theory of "pseudogap": Theory versus experiments
	Marchetti, PA; Su, ZB; Yu, L; Marchetti, PA , Dept Phys, Via F Marzolo 8, I-35131 Padua, Italy.
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS B
	2003
卷号	17 期号:18-20 页码:3359-3362
关键词	T-j Model Normal-state Cuprate Superconductors La2-xsrxcuo4 Resistivity Bosonization Fermions Fields
ISSN号	0217-9792
英文摘要	We propose an explanation of several experimental features related to the "pseudogap" in high T-c cuprates in terms of a spin-charge gauge theory. In this approach, based on a formal spin-charge separation applied to the t-J model, the low energy effective action describes gapful spinons (with a theoretically derived doping dependence of the gap m(s) similar to J(delta\ ln delta\(1/2), where delta is the doping concentration) and holons with "small" Fermi surface (epsilon(F) similar to tdelta) interacting via a gauge field. The main effect of gauge fluctuations is to introduce a dissipation similar toT/chi, where chi is the diamagnetic susceptibility. The competition between the two energy scales, m(s) and T/chi, is the root in our approach of many phenomena peculiar to in-plane transport properties of the "pseudogap phase". Furthermore the gauge interaction induces binding of spinon and holon into an "electron" resonance. This binding introduces another energy scale, the recombination rate, which dominates the out-of-plane resistivity, yielding an insulating behavior. A good agreement is found between the experimental data and theoretically derived doping and temperature dependence of resistivity, both in-plane and out-of-plane, and spin relaxation.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000185634600025
公开日期	2012-08-29
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13245]
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	Marchetti, PA , Dept Phys, Via F Marzolo 8, I-35131 Padua, Italy.
推荐引用方式 GB/T 7714	Marchetti, PA,Su, ZB,Yu, L,et al. Spin-charge gauge theory of "pseudogap": Theory versus experiments[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B,2003,17(18-20):3359-3362.
APA	Marchetti, PA,Su, ZB,Yu, L,&Marchetti, PA , Dept Phys, Via F Marzolo 8, I-35131 Padua, Italy..(2003).Spin-charge gauge theory of "pseudogap": Theory versus experiments.INTERNATIONAL JOURNAL OF MODERN PHYSICS B,17(18-20),3359-3362.
MLA	Marchetti, PA,et al."Spin-charge gauge theory of "pseudogap": Theory versus experiments".INTERNATIONAL JOURNAL OF MODERN PHYSICS B 17.18-20(2003):3359-3362.