頁籤選單縮合
題名 | Phase String Effect in Weakly Doped Antiferromagnet= |
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作者 | Weng,Z. Y.; Sheng,D. N.; Ting,C. S.; |
期刊 | Chinese Journal of Physics |
出版日期 | 19980400 |
卷期 | 36:2(Part2) 民87.04 |
頁次 | 頁204-214 |
分類號 | 330 |
語文 | eng |
關鍵詞 | |
英文摘要 | Spiral instabilities usually obscure theoretical attempt to get into metallic phase by doping. A recently revealed nonlocal phase string effect indicates such spiral effect to be artificial due to an illegitimate mean-field treatment. We present a self-consistent theory which incorporates the nonlocal phase string effect into a bosonic resonating-valence-bond (RVB) description and show a continuous evolution into a metallic phase, where magnetic anomalies in spin susceptibility and NMR are found consistent with experiment and superconducting condensation is always present at low-temperature. A unified phase diagram for the weakly doped t-J model is given, in which an underdoped metallic phase with charge inhomogeneity is also briefly discussed. |
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