| 绝缘层方势垒影响下N-I-d波超导体结的隧道谱 |
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| 引用本文： | 魏健文. 绝缘层方势垒影响下N-I-d波超导体结的隧道谱[J]. 低温物理学报, 2007, 29(3): 192-195 |
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| 作者姓名： | 魏健文 |
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| 作者单位： | 淮阴师范学院物理系,江苏,淮安,223001 |
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| 基金项目： | 江苏省教育厅自然科学基金 |
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| 摘 要： | 以方势垒描述N-I-d波超导体结中绝缘层对准粒子输运的影响,通过求解Bogoliubov-de Gennes(BdG)方程,利用Blonder-Tinkham-Klapwijk(BTK)理论,计算了N-I-d波超导体结的隧道谱.研究表明:(1)绝缘层厚度在不同纳米量级下的隧道谱形状各异,即便其厚度处在同一纳米量级上,彼此间仅相差零点几个纳米,电会导致微分电导随偏压的变化关系迥异,这为解释高Tc氧化物超导体的相关实验现象提供了更多的可能性;(2)粒子的入射角和绝缘层的势垒值对零偏压电导峰有显著影响.
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| 关 键 词： | 方势垒 绝缘层厚度 N-I-d波超导体结 隧道谱 |
| 修稿时间： | 2007-03-152007-05-08 |
TUNNEL SPECTRA IN NORMAL METAL-INSULATOR d-WAVE SUPERCONDUCTOR JUNCTIONS UNDER HE INFLUENCE OF INSULATOR SQUARE BARRIER |
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| Wei Jian-wen. TUNNEL SPECTRA IN NORMAL METAL-INSULATOR d-WAVE SUPERCONDUCTOR JUNCTIONS UNDER HE INFLUENCE OF INSULATOR SQUARE BARRIER[J]. Chinese Journal of Low Temperature Physics, 2007, 29(3): 192-195 |
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| Authors: | Wei Jian-wen |
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| Affiliation: | Department of Physics, Huaiyin Teachers College, Jiangsu Huaian 223001 |
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| Abstract: | Using the square barrier to describe the influence of the insulating layer on the quasi-particle transport in N-I-d-wave superconductor junctions, we calculate the tunnel spectra utilizing the Bogoliubov-de Gennes(BdG) equation and Blonder-Tinkham-Klapwijk (BTK) theory. It is shown that: (1) the tunnel spectra possess different shape ,when insulating layer thickness are in different nano-quantity-level. When the change of the thickness is less than one nanometer, the change of the differential conductance with bias is utterly different even if the thickness are identical in nano-quantity-level.This offer more possible to explain experiment phenomena related to higt-Tc oxide superconductors; (2) the incidence angle of particles and the barrier value of insulating layer have influence notably on the zero-bias conductance peak. |
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| Keywords: | square barrier insulating layer thickness N-I-d-wave superconductor junctions tunnel spectra |
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