Line nodes in the energy gap of superconductingBaFe2(As1−xPx)2single crystals as seen via penetration depth and thermal conductivity

2009/07/31 by K. Hashimoto, M. Yamashita, Minoru Yamashita +15 · 7 citations
Business, Management and Accounting · Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Chemistry #Condensed matter physics #Crystallography #Energy (signal processing) #Geometry #Intellectual Capital and Performance Analysis #Iron-based superconductors research #Line (geometry) #London penetration depth #Materials science #Mathematics #Pairing #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.81.220501

published as Phys. Rev. B 81, 220501(R) (2010) · 4 pages, 3 figures, revised version to be published in Phys. Rev. B Rapid Communication

arxiv created 2010/05/17 · openalex publication_date 2010/06/01 · arxiv updated 2010/06/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report magnetic penetration depth and thermal-conductivity data for high-quality single crystals of BaFe₂(As_1\ensuremath-xP_x)₂(T_c=30 K) which provide strong evidence that this material has line nodes in its energy gap. This is distinctly different from the nodeless gap found for (Ba,K)Fe₂As₂ which has similar T_c and phase diagram. Our results indicate that repulsive electronic interactions play an essential role for Fe-based high-T_c superconductivity but that uniquely there are distinctly different pairing states, with and without nodes, which have comparable T_c.

Citations

• Superfluid density and penetration depth in the iron pnictides
• Effects of Rattling Phonons on the Dynamics of Quasiparticle Excitation in theβ-PyrochloreKOs2O6Superconductor
• Observation of Fermi-surface–dependent nodeless superconducting gaps in Ba 0.6 K 0.4 Fe 2 As 2

Cited by

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• Band-dependent superconducting gap in SrFe2(As0.65P0.35)2 studied by angle-resolved photoemission spectroscopy
• Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the Isovalent-DopedBaFe2(As1−xPx)2
• Transport properties of three-dimensional extendeds-wave states in Fe-based superconductors