| La_（3－x）／2Ba_（（3－x）／2）Ca_xCu_3O_y超导体正电子寿 |
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| 引用本文： | 史志强,钞曦旭. La_（3－x）／2Ba_（（3－x）／2）Ca_xCu_3O_y超导体正电子寿[J]. 陕西师范大学学报(自然科学版), 1994, 0(2) |
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| 作者姓名： | 史志强 钞曦旭 |
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| 作者单位： | 陕西师范大学物理学系 |
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| 摘 要： | 用ｘｔ子寿命谱方法研究Ｃａ局域替换Ｌａ（３－ｘ）／２Ｂａ（３－ｘ）／２ＣａｘＣｕ３Ｏｙ中的Ｌａ和Ｂａ引起的电子结构变化；并结合氧含量和转变温度的测量，分析了电子密度增加的原因．实验表明，随着Ｃａ含量的增加，体系正常态的正电子寿命明显减小，这表明正电子探测的电子密度增加．
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| 关 键 词： | 正电子寿命；氧化物超导体；电子结构 |
Positron Lifetime on La_((3-x)/2Ba_((3-x)/2)Ca_xCu_3O_y Superconductors |
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| Shi Zhiqiang,Chao Xixu ). Positron Lifetime on La_((3-x)/2Ba_((3-x)/2)Ca_xCu_3O_y Superconductors[J]. Journal of Shaanxi Normal University: Nat Sci Ed, 1994, 0(2) |
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| Authors: | Shi Zhiqiang Chao Xixu ) |
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| Abstract: | Using the method of positron lifetime spectroscopy, the change of electronic structures caused by local substitution of Ca for La and Ba in La<,--.>l,Ba,,--.>/,Ca.Cu,O.material is studied. A decrease in the normal state lifetime of this system is experimentally observed with an increase in Ca concentration. It indicates an increase in electron densities detected by positron. With the measurement of oxygen content and critical temperature, the cause of an increase in electron densities have been studied. |
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| Keywords: | positron lifetime superconductors electronic stuctures |
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