Quasiparticle Mass Enhancement Close to the Quantum Critical Point in BaFe_{2}(As_{1-x}P_{x})_{2}

  • Walmsley P
  • Putzke C
  • Malone L
 et al. 
  • 21


    Mendeley users who have this article in their library.
  • N/A


    Citations of this article.


We report a combined study of the specific heat and de Haas-van Alphen effect in the iron-pnictide superconductor BaFe$_2$(As$_{1-x}$P$_x$)$_2$. Our data when combined with results for the magnetic penetration depth give compelling evidence for the existence of a quantum critical point (QCP) close to $x=0.30$ which affects the majority of the Fermi surface by enhancing the quasiparticle mass. The results show that the sharp peak in the inverse superfluid density seen in this system results from a strong increase in the quasiparticle mass at the QCP.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • P Walmsley

  • C Putzke

  • L Malone

  • I. Guillamón

  • D Vignolles

  • C Proust

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free