Spin-charge gauge theory of "pseudogap": Theory versus experiments
文献类型：会议论文
| 作者 | Marchetti, PA; Su, ZB ; Yu, L
|
| 出版日期 | 2003 |
| 会议日期 | JAN 16-21, 2003 |
| 会议地点 | SAN DIEGO, CALIFORNIA |
| 关键词 | T-J MODEL NORMAL-STATE CUPRATE SUPERCONDUCTORS LA2-XSRXCUO4 RESISTIVITY BOSONIZATION FERMIONS FIELDS |
| 卷号 | 17 |
| 期号 | 18-20 |
| DOI | 10.1142/S0217979203020983 |
| 页码 | 3359-3362 |
| 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 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. |
| 会议录 | INTERNATIONAL JOURNAL OF MODERN PHYSICS B
 |
| 会议录出版者 | WORLD SCIENTIFIC PUBL CO PTE LTD |
| 会议录出版地 | SINGAPORE |
| 语种 | 英语 |
| URL标识 | 查看原文 |
| ISSN号 | 0217-9792 |
| WOS研究方向 | Physics |
| 源URL | [http://ir.itp.ac.cn/handle/311006/23728]  |
| 专题 | SCI会议论文 |
| 作者单位 | 1.Dept Phys, I-35131 Padua, Italy 2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China 3.Ist Nazl Fis Nucl, I-35131 Padua, Italy |
| 推荐引用方式 GB/T 7714 | Marchetti, PA,Su, ZB,Yu, L. Spin-charge gauge theory of "pseudogap": Theory versus experiments[C]. 见:. SAN DIEGO, CALIFORNIA. JAN 16-21, 2003. |
入库方式： OAI收割
来源：理论物理研究所
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