Session P39: Focus Session: Superconductivity-Theory and Computation (Mainly First Principles)
11:15 AM–2:03 PM, Wednesday, March 15, 2006
Baltimore Convention Center Room: 342
Sponsoring Units:
DCOMP DCMP
Chair: Ole Andersen, Max Planck Institute
Abstract ID: BAPS.2006.MAR.P39.7
Abstract: P39.00007 : Electron-phonon Interaction in Graphite-Intercalation Compounds
12:51 PM–1:03 PM
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Abstract 
Authors:
Lilia Boeri
(Max-Planck-Institut f\"ur Festk\"orperForschung, Stuttgart, Germany)
Matteo Giantomassi
(Unit\'e de Physico-Chimie et de Physique des Mat\'eriaux, Universit\'e Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium)
Giovanni B. Bachelet
(INFM Center for Statistical Mechanics and Complexity and Dipartimento di Fisica, Universit\`a ``la Sapienza", Roma, Italy)
Ole Krogh Andersen
(Max-Planck-Institut f\"ur Festk\"orperForschung, Stuttgart, Germany)
After the discovery of superconductivity with a Tc of 11.5 K in Ca-intercalated graphite (CaC6 )[1], the interest in graphite-intercalation compounds has been revived. Different pairing mechanisms, based on excitons or electron-phonon interactions, have been put forward [2]. In this contribution we first analyze, using the NMTO[3] method, the electronic structure of CaC6. We then propose a simple model, based on pure graphite, to explain superconductivity in this class of compounds. Implications on the design of new materials with similar superconducting properties are also discussed. \newline [1] T.E. Weller {\em et al.}, Nature Physics {\bf 1}, 39 (2005). [2] G. Csany {\em et al.}, Nature Physics {\bf 1}, 42 (2005); I. I. Mazin, cond-mat/0504127; M. Calandra and F. Mauri, . [3] O.K. Andersen and T. Saha-Dasgupta, Phys. Rev. B 62, R16219 and O.K. Andersen, T. Saha-Dasgupta and S. Ezhov, Bull. Mat. Sci. 26, 19 (2003).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2006.MAR.P39.7