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

doi:10.1142/S0217979203020983

	Spin-charge gauge theory of "pseudogap": Theory versus experiments
	Marchetti, PA ; Su, ZB ; Yu, L
	2003
会议日期	JAN 16-21, 2003
会议地点	SAN DIEGO, CALIFORNIA
关键词	T-J MODEL NORMAL-STATE CUPRATE SUPERCONDUCTORS LA2-XSRXCUO4 RESISTIVITY BOSONIZATION FERMIONS FIELDS
卷号	17
期号	18-20
DOI	10.1142/S0217979203020983
页码	3359-3362
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.
会议录	INTERNATIONAL JOURNAL OF MODERN PHYSICS B
会议录出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
会议录出版地	SINGAPORE
语种	英语
URL标识	查看原文
ISSN号	0217-9792
WOS研究方向	Physics
内容类型	会议论文
源URL	[http://ir.itp.ac.cn/handle/311006/23728]
专题	SCI会议论文
作者单位	1.Dept Phys, I-35131 Padua, Italy 2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China 3.Ist Nazl Fis Nucl, I-35131 Padua, Italy
推荐引用方式 GB/T 7714	Marchetti, PA,Su, ZB,Yu, L. Spin-charge gauge theory of "pseudogap": Theory versus experiments[C]. 见:. SAN DIEGO, CALIFORNIA. JAN 16-21, 2003.