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Citation: Cao Yang, Liu Jian. Energy Band Structures of Duble Tl-O Layer Tl-Ba-Ca-Cu Oxide Superconductors[J]. Acta Physico-Chimica Sinica, ;1992, 8(04): 445-451. doi: 10.3866/PKU.WHXB19920405 shu

Energy Band Structures of Duble Tl-O Layer Tl-Ba-Ca-Cu Oxide Superconductors

Cao Yang ,
Liu Jian

1.
Department of Chemistry, Suzhou University, Suzhou 215006; Department of Chemistry, Suzhou Railway Teachers College, Suzhou 215009

Received Date: 13 March 1991
Available Online: 15 August 1992

We calculated the energy band structures of the double TI-O layer TI-Ba-Ca-CuO oxide superconductors by performing the tight-binding band structure calculation method on the basis of EHT approximation. The results show that the Fermi surfaces are closed on the a~*b~* plane. The increase of electronic state densities on the Fermi level is consistent with the raise of T_c in this system. The regular changing of the net charges of Cu and O indicates that the ionic states of Cu and O in Cu-O plane may influence the superconductivity of this system.
- Band structure; Tl-Ba-Ca-Cu-O; Superconductor
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