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| Spin-charge gauge approach to "pseudogap": theory versus experiments | |
Marchetti, PA; Orso, G; Su, ZB ; Yu, L
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| 2004 | |
| Conference Name | 7th International Conference on Materials and Mechanisms of Superconductive and High Temperature Superconductors |
| Source Publication | PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS |
| Volume | 408 |
| Pages | 412-413 |
| Conference Date | MAY 25-30, 2003 |
| Conference Place | Rio de Janeiro, BRAZIL |
| Publication Place | AMSTERDAM |
| ISSN | 0921-4534 |
| Publisher | ELSEVIER SCIENCE BV |
| Abstract | 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 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. |
| Keyword | C-AXIS RESISTIVITY NORMAL-STATE CUPRATE SUPERCONDUCTORS INSULATOR CROSSOVER SINGLE-CRYSTALS LA2-XSRXCUO4 MAGNETORESISTANCE FERMIONS FIELDS FILMS |
| DOI | 10.1016/j.physc.2004.03.003 |
| URL | 查看原文 |
| Indexed By | CPCI |
| Language | 英语 |
| WOS Research Area | Physics |
| WOS Subject | Physics, Applied ; Physics, Condensed Matter |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/23720 |
| Collection | SCI会议论文 |
| Affiliation | 1.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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