Reaction between different structural blocks and its influence on superconductivity in Tl2Ba2Can-1CunO2n+3

被引：0

作者：

Han, S. H. ^{[1
,2
]}

Yu, J. ^{[1
]}

Xu, Y. Y. ^{[1
]}

Zhang, H. ^{[1
]}

机构：

[1] Peking Univ, Dept Phys, State Key Lab Mesoscope Phys, Phys Mat Lab, Beijing 100871, Peoples R China

[2] Shandong Univ, Sch Phys & Elect, Jinan 250010, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2007年 / 21卷 / 18-19期

关键词：

superconductivity; structure; cohesive energy;

D O I：

10.1142/S0217979207044056

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The non-monotonic relationship of T, with the number of Cu-O planes (n) per unit cell for compounds of Tl2Ba2Can-1CUnO2n+3 (n=1, 2, 3, 4 and 5) is investigated from the reaction between different structural blocks. The unit cell of the Tl superconductors is treated as two blocks: the perovskite block where the Cu-O planes are located and the rock salt block, which is considered as a charge-reservoir. A model was used to calculate the combinative energy of the two blocks. It is found that the combinative energy between the two blocks is closely related to the value of T-c. The relation demonstrates an interesting way to understand the nonlinear change of T, with the number of Cu-O planes in the layered superconductors. This means that the interaction between the two blocks plays an important role in superconductivity. The results are somewhat different from that of another Tl-system superconductor, Tl2Ba2Can-1CunO2n+4, with 4 superconductive compounds.

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收藏

页码：3148 / 3150

页数：3

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