paper

First-principles study of electronic structure of

arXiv:1307.4491

Abstract

We present for the first time the band structure calculation of compound in the tetragonal structure (space group ). We used the Local Density Approximation (LDA) as in the Wien2k code. We analyze in detail the band structure and the Fermi surface (FS). Our results are in very good agreement with recent experiments. The FS shows the feature known as the Bi-O pocket problem which we associate with the interaction of the O3 atoms with the Cu2-O2 and Bi-O4 planes. Ceramic stabilized with Pb has been reported as a superconductor with . CdS microparticles were embedded into the ceramic . The composite did show a superconducting phase transition at a lower . At even lower temperatures re-entrant behavior was observed. The sample regain the superconducting state at [arXiv:1101.0277 [cond-mat.supr-con]]. This effect is not observe in the ceramic alone. This calculation is useful per ser and also can contribute to a better understanding of this particular re-entrant behavior.

10 pages, 7 figures

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