Relationship Between Cohesive Energy and Superconductivity in Hg-System Superconductors
| Autor: | Xiao-chuan Qin, Xu Du, Han Zhang |
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| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Chinese Physics Letters. 15:745-747 |
| ISSN: | 1741-3540 0256-307X |
| Popis: | Calculation of cohesive energy on Hg-system superconductors HgBa2CuOy(1201), HgBa2CaCu2Oy(1212), HgBa2 Ca2Cu3Oy(1223), HgBa2Ca3Cu4Oy(1234), and HgBa2Ca4Cu5Oy(1245) has been made. A program was developed to calculate 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. |
| Databáze: | OpenAIRE |
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