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...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.展开更多
基金Supported by the Trans-Century Training Programs Foundation for the Talents by the Ministry of Education of China。
文摘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.
