Session L23: Focus Session: Search for New Superconductors II: Towards Theoretical Design

2:30 PM–5:30 PM, Tuesday, March 22, 2011
Room: D165

Sponsoring Unit: DMP
Chair: Philip Phillips, University of Illinois

Abstract ID: BAPS.2011.MAR.L23.5

Abstract: L23.00005 : The Possibility of Phonon-Mediated Superconductivity in an Iron-Based Material

3:42 PM–3:54 PM

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  Sheena Shah
    (University of Oxford )

  Elena Roxana Margine
    (University of Oxford )

  Aleksey Kolmogorov
    (University of Oxford )

We have identified a synthesizable candidate FeB4 material with a potential for conventional superconductivity at 15-20 K [1,2]. The strong electron-phonon coupling in the proposed material is unexpected as the recently discovered iron-based superconductors are considered to display an unconventional pairing mechanism. The new nonmagnetic ground state crystal structure has been predicted with an ab initio evolutionary search [3] and shown to be marginally stable at ambient pressures. \\[4pt] [1] A. N. Kolmogorov, S. Shah, E. R. Margine, A. F. Bialon, T. Hammerschmidt, R. Drautz, Phys. Rev. Lett. 105, 217003 (2010). \\[0pt] [2] A. F. Bialon, T. Hammerschmidt, R. Drautz, S. Shah, E. R. Margine, A. N. Kolmogorov (submitted) \\[0pt] [3] A. N. Kolmogorov, MAISE (

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