Session X2: Coexistence Between Antiferromagnetism and Superconductivity in Fe-pnictides

2:30 PM–5:30 PM, Thursday, March 24, 2011
Room: Ballroom A2

Sponsoring Unit: DCMP
Chair: Joerg Schmailian, Iowa State University

Abstract ID: BAPS.2011.MAR.X2.3

Abstract: X2.00003 : Superconductivity and magnetism in 111 iron pnictides

3:42 PM–4:18 PM

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  Sergey Borisenko
    (Institute for Solid State Research, IFW-Dresden, Helmholtzstrasse 20, 01069, Dresden, Germany)

We study different 111 materials at ultra low temperatures by means of angle-resolved photoemission spectroscopy (ARPES). The measurements provide a direct access to the information on the low energy electronic structure, which includes the detailed knowledge of the Fermi surface, band renormalization, electronic self-energy and symmetry of the superconducting order parameter. The results suggest a direct correlation between the fermiology and fundamental physical properties throughout the phase diagram of 111 iron superconductors. In particular, the Van Hove singularity is identified as playing a primary role for the superconductivity.

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