Relationship Between Cohesive Energy and Superconductivity in Hg-System Superconductors

秦小川; 杜序; 张酣

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Relationship Between Cohesive Energy and Superconductivity in Hg-System Superconductors

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Calculation of cohesive energy on Hg-system superconductors HgBa_(2)CuO_(y)(1201),HgBa_(2)CaCu2O_(y)(1212),HgBa_(2)Ca_(2)Cu_(3)O_(y)(1223),HgBa_(2)Ca3Cu4O_(y)(1234),and HgBa_(2)Ca4Cu5O_(y)(1245)has been made.A program was developed to claculate the combinative energy between Cu-O planes and remaining parts,and between blocks in the superconductors.The result indicates that if the cell is considered as the two blocks combined together,a close relationship among the combinative energy of the two blocks,the value of Tc,and the number of the Cu-O planes in the Hg-system superconductors is established.The result gives a new way to understand the change of the value of Tc,as the number of the Cu-O planes.In contrast,the combinative energy between the Cu-O planes and the remains got from the method separating all the Cu-O planes from the cell and leaving some discrete remaining parts does not show any relationship with the value of Tc.This means that considering the cell as the two blocks in more reasonable,and the interaction between the two blocks plays an important role in superconductivity.

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《中国物理快报：英文版》 |1998年第10期|P.745-747|共3页
作者
秦小川; 杜序; 张酣;
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作者单位

Materials Physics Laboratory State Key Laboratory for Aritificial Microstructure and Mesoscope Physics Department of Physics Peking University Beijing 100871;

Materials Physics Laboratory State Key Laboratory for Aritificial Microstructure and Mesoscope Physics Department of Physics Peking University Beijing 100871;

Materials Physics Laboratory State Key Laboratory for Aritificial Microstructure and Mesoscope Physics Department of Physics Peking University Beijing 100871;

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原文格式 PDF
正文语种 chi
中图分类低温物理学;
关键词
superconductors; system; separating;

Relationship Between Cohesive Energy and Superconductivity in Hg-System Superconductors

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