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Spin-charge gauge approach to "pseudogap": theory versus experiments
Marchetti, PA; Orso, G; Su, ZB; Yu, L
2004
Conference Name7th International Conference on Materials and Mechanisms of Superconductive and High Temperature Superconductors
Source PublicationPHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume408
Pages412-413
Conference DateMAY 25-30, 2003
Conference PlaceRio de Janeiro, BRAZIL
Publication PlaceAMSTERDAM
ISSN0921-4534
PublisherELSEVIER SCIENCE BV
AbstractWe 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 to T/chi where chi is the diamagnetic susceptibility. The competition between the two energy scales, in, and T/chi is the root in our approach of many phenomena peculiar to transport properties of the "pseudogap phase". A good agreement is found between the experimental data and theoretically derived doping and temperature dependence of many physical quantities, such as in-plane and out-of-plane resistivity, in-plane magnetoresistance, far infrared electronic AC conductivity and spin lattice relaxation rate. (C) 2004 Elsevier B.V. All rights reserved.
KeywordC-AXIS RESISTIVITY NORMAL-STATE CUPRATE SUPERCONDUCTORS INSULATOR CROSSOVER SINGLE-CRYSTALS LA2-XSRXCUO4 MAGNETORESISTANCE FERMIONS FIELDS FILMS
DOI10.1016/j.physc.2004.03.003
URL查看原文
Indexed ByCPCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Applied ; Physics, Condensed Matter
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23720
CollectionSCI会议论文
Affiliation1.Univ Padua, Dept Phys, I-35131 Padua, Italy
2.Univ Padua, Ist Nazl Fis Nucl, I-35131 Padua, Italy
3.SISSA, Sch Adv Int Studies, I-34014 Trieste, Italy
4.INFM, I-34014 Trieste, Italy
5.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Marchetti, PA,Orso, G,Su, ZB,et al. Spin-charge gauge approach to "pseudogap": theory versus experiments[C]. AMSTERDAM:ELSEVIER SCIENCE BV,2004:412-413.
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