Doping dependence of the specific heat of single-crystal BaFe 2 (As 1-x P x ) 2

Chaparro, C.; Fang, L.; Claus, H.; Rydh, A.; Crabtree, G. W.; Stanev, V.; Kwok, W. K.; Welp, U.

doi:10.1103/PhysRevB.85.184525

Doping dependence of the specific heat of single-crystal BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

Journal Article · Tue May 01 04:00:00 EDT 2012 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.85.184525· OSTI ID:1385501

Chaparro, C.; Fang, L.; Claus, H.; Rydh, A.; Crabtree, G. W.; Stanev, V.; Kwok, W. K.; Welp, U.

We present specific heat measurements on a series of BaFe 2 (As 1 - x P x ) 2 single crystals with phosphorous doping ranging from x = 0.3 to x = 0.55. Our results reveal that BaFe 2 (As 1 - x P x ) 2 follows the scaling Δ C / T c ≈ T 2 c remarkably well. The clean-limit nature of this material imposes additional restraints on theories aimed at explaining the scaling. Furthermore, we find that the Ginzburg-Landau parameter decreases significantly with doping whereas the superconducting anisotropy is Γ ≈ 2.6, independent of doping.

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)

Sponsoring Organization:: USDOE SC Office of Basic Energy Sciences (SC-22)

DOE Contract Number:: AC02-98CH10886

OSTI ID:: 1385501

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 18 Vol. 85; ISSN 1098-0121; ISSN PRBMDO

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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