National Changhua University of Education Institutional Repository : Item 987654321/14091
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 6507/11669
造訪人次 : 29962611      線上人數 : 520
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 進階搜尋

請使用永久網址來引用或連結此文件: http://ir.ncue.edu.tw/ir/handle/987654321/14091

題名: Two-leg t-J ladder: A Mean-field Description
作者: Lee, Yu-Li;Lee, Y. W.;Mou, C. Y.;Weng, Z. Y.
貢獻者: 物理學系
日期: 1999
上傳時間: 2012-09-10T06:07:26Z
出版者: The American Physical Society
摘要: Two-leg t-J ladders are investigated in the framework of a combination of the phase string formulation and bond-operator representation. We develop a mean-field theory in the strong rung interaction regime, i.e., J⊥≫J,t, which provides a unified description of the undoped insulating phase and the low-doping phase—the so-called C1S0 phase. Both of them are characterized by the resonating-valence-bond (RVB) order parameter, with gap opened up in all spin excitations. The ground state of the doped phase is intrinsically a superconductor with a d-wave symmetry, which is driven by the RVB correlations. The ground-state energy is in good agreement with numerical results. Phase separation is shown to occur beyond some critical value of J/t for given doping concentration. The local structure of hole pairs as well as the spectra of various spin and charge modes are analyzed in comparison with other approaches.
關聯: Phys. Rev. B, 60(19): 13418-13428
顯示於類別:[物理學系] 期刊論文

文件中的檔案:

檔案 大小格式瀏覽次數
index.html0KbHTML667檢視/開啟


在NCUEIR中所有的資料項目都受到原著作權保護.

 

DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋