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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.
2003
发表期刊INTERNATIONAL JOURNAL OF MODERN PHYSICS B
ISSN0217-9792
卷号17期号:18-20页码:3359-3362
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.
部门归属Dept Phys, I-35131 Padua, Italy; Ist Nazl Fis Nucl, I-35131 Padua, Italy; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词T-j Model Normal-state Cuprate Superconductors La2-xsrxcuo4 Resistivity Bosonization Fermions Fields
学科领域Physics
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收录类别SCI
WOS记录号WOS:000185634600025
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13245
专题理论物理所1978-2010年知识产出
通讯作者Marchetti, PA , Dept Phys, Via F Marzolo 8, I-35131 Padua, Italy.
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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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