| 高压下高温超导材料YBa2Cu3O7的电子结构 |
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| 引用本文： | 王怀玉,章立源.高压下高温超导材料YBa2Cu3O7的电子结构[J].高压物理学报,1990,4(3):194-203. |
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| 作者姓名： | 王怀玉 章立源 |
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| 作者单位： | 北京大学物理系
(王怀玉，章立源，刘福绥)，北京大学物理系(王恩哥) |
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| 摘 要： | 本文选用拟合能带的Harrison参数构造紧束缚哈密顿矩阵，采取Recursion方法计算了YBa2Cu3O7晶体在常压下与9 GPa高压下（此时晶格常数压缩3%）的电子结构。讨论了高压对于电子结构的影响。给出了高压下费米面移动，能带展宽和各晶位原子价变化的定量结果。
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| 关 键 词： | 电子态密度 高压下的电子结构 能带宽度 费米面 原子价 |
| 收稿时间： | 1990-02-26; |
THE ELECTRONIC STRUCTURE OF HIGH TEMPERATURE SUPERCONDUCTING MATERIAL YBa_2Cu_3O_7 UNDER HIGH PRESSURE |
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| Wang Huaiyu,Zhang Liyuan,Liu Fusui,Wang Enge.THE ELECTRONIC STRUCTURE OF HIGH TEMPERATURE SUPERCONDUCTING MATERIAL YBa_2Cu_3O_7 UNDER HIGH PRESSURE[J].Chinese Journal of High Pressure Physics,1990,4(3):194-203. |
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| Authors: | Wang Huaiyu Zhang Liyuan Liu Fusui Wang Enge |
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| Institution: | Department of Physics, Peking University, Beijing 100871, China |
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| Abstract: | The electronic structure of YBa2Cu3O7 under atmosphere and 9GPa high pressure (under which the crystal constants are contracted by 3%) are calculated, respectively. In calculation, recursion method is used and the tight binding Hamiltonian is constructed by Harrison parameters fitted to energy band. The influence of high pressure on electronic structure is discussed. The quantitative results about shift of Fermi surface, widening of energy band width and varying of atomic valence of each crystal site are given. |
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| Keywords: | electronic density of states electronic structure under high pressure energy band width Fermi surface atomic valence |
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