Spin-charge gauge approach to "pseudogap": theory versus experiments
文献类型：会议论文
| 作者 | Marchetti, PA; Orso, G; Su, ZB ; Yu, L
|
| 出版日期 | 2004 |
| 会议日期 | MAY 25-30, 2003 |
| 会议地点 | Rio de Janeiro, BRAZIL |
| 关键词 | C-AXIS RESISTIVITY NORMAL-STATE CUPRATE SUPERCONDUCTORS INSULATOR CROSSOVER SINGLE-CRYSTALS LA2-XSRXCUO4 MAGNETORESISTANCE FERMIONS FIELDS FILMS |
| 卷号 | 408 |
| DOI | 10.1016/j.physc.2004.03.003 |
| 页码 | 412-413 |
| 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 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. |
| 会议录 | PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
 |
| 会议录出版者 | ELSEVIER SCIENCE BV |
| 会议录出版地 | AMSTERDAM |
| 语种 | 英语 |
| URL标识 | 查看原文 |
| ISSN号 | 0921-4534 |
| WOS研究方向 | Physics |
| 源URL | [http://ir.itp.ac.cn/handle/311006/23720]  |
| 专题 | SCI会议论文 |
| 作者单位 | 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.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China 5.INFM, I-34014 Trieste, Italy |
| 推荐引用方式 GB/T 7714 | Marchetti, PA,Orso, G,Su, ZB,et al. Spin-charge gauge approach to "pseudogap": theory versus experiments[C]. 见:. Rio de Janeiro, BRAZIL. MAY 25-30, 2003. |
入库方式： OAI收割
来源：理论物理研究所
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