Specific Heat vs Field in the 30 K Superconductor BaFe2(As0.7P0.3)2

J. S. Kim; P. J. Hirschfeld; G. R. Stewart; S. Kasahara; T. Shibauchi; T. Terashima; Y. Matsuda

doi:10.1103/PhysRevB.81.214507

Specific Heat vs Field in the 30 K Superconductor BaFe2(As0.7P0.3)2

Superconductivity 2015-05-18 v2

Authors: J. S. Kim , P. J. Hirschfeld , G. R. Stewart , S. Kasahara , T. Shibauchi , T. Terashima , Y. Matsuda

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Abstract

We report specific heat measurements on the Fe-based superconductor BaFe2(As0.7P0.3)2, a material on which previous penetration depth, NMR, and thermal conductivity measurements have observed a high density of low-energy excitations, which have been interpreted in terms of order parameter nodes. Within the resolution of our measurements, the low temperature limiting C/T is found to be linear in field, i.e. we find no evidence for a Volovik effect associated with nodal quasiparticles in either the clean or dirty limit. We discuss possible reasons for this apparent contradiction.

Keywords

specific heat iron-based superconductor BaFe2(As0.7P0.3)2 order parameter nodes Volovik effect low-energy excitations magnetic field dependence

Cite

@article{arxiv.1002.3355,
  title  = {Specific Heat vs Field in the 30 K Superconductor BaFe2(As0.7P0.3)2},
  author = {J. S. Kim and P. J. Hirschfeld and G. R. Stewart and S. Kasahara and T. Shibauchi and T. Terashima and Y. Matsuda},
  journal= {arXiv preprint arXiv:1002.3355},
  year   = {2015}
}

Comments

15 pages, 4 figures; accepted in Physical Review B

Specific Heat vs Field in the 30 K Superconductor BaFe2(As0.7P0.3)2

Abstract

Keywords

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