| 二维体系的超导转变温度 |
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| 引用本文： | 徐铁峰,叶庆卫,白贵儒.二维体系的超导转变温度[J].宁波大学学报(理工版),1992(1). |
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| 作者姓名： | 徐铁峰 叶庆卫 白贵儒 |
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| 作者单位： | 宁波大学物理系，宁波大学物理系，宁波大学物理系 88级学生 |
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| 摘 要： | 如何解释氧化物超导体的高 T_c,是目前高温超导研究的主要任务之一。由于所发现的氧化物超导体具有二维的结构特征,态密度的 Van Hove 奇异性的作用又重新引起注意。本文较为严格地求解了决定 T_c 的积分方程,结果表明态密度的 Van Hove奇异性虽然可以提高 T_c,但并不如人们所估计的那么显著。
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| 关 键 词： | 二维体系 超导转变温度 Van Hove 奇异性 |
THE TRANSITION TEMPERATURE OF SUPERCONDUCTIVITY IN TWO-DIMENSIONAL SYSTEMS |
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| Xu Tiefeng Ye Qingwei Bai Guiru.THE TRANSITION TEMPERATURE OF SUPERCONDUCTIVITY IN TWO-DIMENSIONAL SYSTEMS[J].Journal of Ningbo University(Natural Science and Engineering Edition),1992(1). |
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| Authors: | Xu Tiefeng Ye Qingwei Bai Guiru |
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| Abstract: | In this paper,the enhancement of transition temperature due to Van Hove singularity is exam- ined carfully.The gap equation has been solved rigorously by complex integral method.The derived Tc formula has the self-consistent form and depends on the ratio of Debye temperature and Fermi energy.Numerical examples show that the enhancement of transition temperature is not as effective as estimated before.The conclusion has therefore been made that it seems unlikely that the Van Hove enhancement mechanism is responsible for oxides superconductors. |
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| Keywords: | two-dimensional systems transition temperature of superconductivity Van Hove singularity |
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