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| Spin-charge gauge theory of "pseudogap": Theory versus experiments | |
Marchetti, PA; Su, ZB ; Yu, L
| |
| 2003 | |
| Conference Name | 4th International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials |
| Source Publication | INTERNATIONAL JOURNAL OF MODERN PHYSICS B |
| Volume | 17 |
| Issue | 18-20 |
| Pages | 3359-3362 |
| Conference Date | JAN 16-21, 2003 |
| Conference Place | SAN DIEGO, CALIFORNIA |
| Publication Place | SINGAPORE |
| ISSN | 0217-9792 |
| Publisher | WORLD SCIENTIFIC PUBL CO PTE LTD |
| 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 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. |
| Keyword | T-J MODEL NORMAL-STATE CUPRATE SUPERCONDUCTORS LA2-XSRXCUO4 RESISTIVITY BOSONIZATION FERMIONS FIELDS |
| DOI | 10.1142/S0217979203020983 |
| URL | 查看原文 |
| Indexed By | CPCI |
| Language | 英语 |
| WOS Research Area | Physics |
| WOS Subject | Physics, Applied ; Physics, Condensed Matter ; Physics, Mathematical |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/23728 |
| Collection | SCI会议论文 |
| Affiliation | 1.Dept Phys, I-35131 Padua, Italy 2.Ist Nazl Fis Nucl, I-35131 Padua, Italy 3.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China |
| Recommended Citation GB/T 7714 | Marchetti, PA,Su, ZB,Yu, L. Spin-charge gauge theory of "pseudogap": Theory versus experiments[C]. SINGAPORE:WORLD SCIENTIFIC PUBL CO PTE LTD,2003:3359-3362. |
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