| PrBa2Cu3O7-δ的制备和电子结构 |
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| 引用本文： | 王顺喜,何振辉,张其瑞,赵慧卿,钱逸泰,陈祖耀,季明荣.PrBa2Cu3O7-δ的制备和电子结构[J].物理学报,1989,38(6):1021-1025. |
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| 作者姓名： | 王顺喜 何振辉 张其瑞 赵慧卿 钱逸泰 陈祖耀 季明荣 |
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| 作者单位： | (1)中国科学技术大学结构成分分析中心; (2)中国科学技术大学物理系; (3)中国科学技术大学应用化学系 |
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| 基金项目： | 国家自然科学基金;国家教育委员会博士点基金 |
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| 摘 要： | 采用固相反应法制备了正交单相PrBa2Cu3O7-δ样品.运用标准直流四引线法测量了该样品的电阻,发现它随温度的变化呈半导体行为.通过XPS测量表明,样品中明显合有Pr4+.最后从能带结构讨论了PtBa2Cu307-δ不超导的原因.
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| 关 键 词： | PrBa2Cu3O7－δ 制备 电子结构 |
| 收稿时间： | 1988-10-11 |
THE PREPARATION AND ELECTRONIC STRUCTURE OF PrBa2Cu3O7-δ |
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| WANG SHUN-XI,HE ZHEN-HUI,ZHANG QI-RUI,ZHAO HUI-QING,QIAN YI-TAI,CHEN ZU-YAO and JI MING-RONG.THE PREPARATION AND ELECTRONIC STRUCTURE OF PrBa2Cu3O7-δ[J].Acta Physica Sinica,1989,38(6):1021-1025. |
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| Authors: | WANG SHUN-XI HE ZHEN-HUI ZHANG QI-RUI ZHAO HUI-QING QIAN YI-TAI CHEN ZU-YAO and JI MING-RONG |
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| Abstract: | Single phase samples of PrBa2Cu3O7-δ with orthorhombic structure were prepared by solid State reaction method. Resistance measurement was performed by a standard dc four-probe technique. It is found that the resistance exhibits semiconductor-like behavior. Results of XPS measurement indicate obviously the existence of Pr4+ in PrBa2Cu3O7-δ. Finally, the band structure was used to discuss the reasor why PrBa2Cu3O7-δ does not show superconductivity. |
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