Evolution of the fermi surface of BaFe2(As1-xPx)2 on entering the superconducting dome

H. Shishido, A. F. Bangura, A. I. Coldea, S. Tonegawa, K. Hashimoto, S. Kasahara, P. M.C. Rourke, H. Ikeda, T. Terashima, R. Settai, Y. Onuki, D. Vignolles, C. Proust, B. Vignolle, A. McCollam, Y. Matsuda, T. Shibauchi, A. Carrington

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170 Citations (Scopus)

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 (Tc 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 Tc. 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.

Original languageEnglish
Article number057008
JournalPhysical review letters
Volume104
Issue number5
DOIs
Publication statusPublished - 2010 Feb 5

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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