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  • Title: Evolution of the Fermi surface of BaFe2(As1-xPx){2} on entering the superconducting dome.
    Author: Shishido H, Bangura AF, Coldea AI, Tonegawa S, Hashimoto K, Kasahara S, Rourke PM, Ikeda H, Terashima T, Settai R, Onuki Y, Vignolles D, Proust C, Vignolle B, McCollam A, Matsuda Y, Shibauchi T, Carrington A.
    Journal: Phys Rev Lett; 2010 Feb 05; 104(5):057008. PubMed ID: 20366792.
    Abstract:
    Using the de Haas-van Alphen effect we have measured the evolution of the Fermi surface of BaFe2(As1-xPx){2} as a function of isoelectric substitution (As/P) for 0.41<x<1 (T{c} up to 25 K). We find that the volumes of electron and hole Fermi surfaces shrink linearly with decreasing x. This shrinking is accompanied by a strong increase in the quasiparticle effective mass as x is tuned toward the maximum T{c}. These results are not explained by simple band structure calculations, and it is likely that these trends originate from the same many-body interactions which give rise to superconductivity.
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