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Marchetti, PA; Su, ZB; Yu, L; Marchetti, PA , Dept Phys, Via F Marzolo 8, I-35131 Padua, Italy.
Spin-charge gauge theory of "pseudogap": Theory versus experiments
Source PublicationINTERNATIONAL JOURNAL OF MODERN PHYSICS B
KeywordT-j Model Normal-state Cuprate Superconductors La2-xsrxcuo4 Resistivity Bosonization Fermions Fields
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 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.
2003
ISSN0217-9792
Volume17Issue:18-20Pages:3359-3362
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13245
Collection理论物理所科研产出_SCI论文
Corresponding AuthorMarchetti, PA , Dept Phys, Via F Marzolo 8, I-35131 Padua, Italy.
Recommended Citation
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.
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