Are there nodes in LaFePO, BaFe$_2$(AsP)$_2$, and KFe$_2$As$_2$ ?

Yunkyu Bang

doi:10.1088/0953-2048/25/8/084002

paper

Are there nodes in LaFePO, BaFe $_{2}$ (AsP) $_{2}$ , and KFe $_{2}$ As $_{2}$ ?

arXiv:1204.0212 · doi:10.1088/0953-2048/25/8/084002

Abstract

We reexamined the experimental evidences for the possible existence of the superconducting (SC) gap nodes in the three most suspected Fe-pnictide SC compounds: LaFePO, BaFe $_{2}$ (As $_{0.67}$ P $_{0.33}$ ) $_{2}$ , and KFe $_{2}$ As $_{2}$ . We showed that while the $T$ -linear temperature dependence of the penetration depth $λ (T)$ of these three compounds indicate extremely clean nodal gap superconductors, the thermal conductivity data $lim_{T, H \to 0} κ_{S} (H, T) / T$ unambiguously showed that LaFePO and BaFe $_{2}$ (As $_{0.67}$ P $_{0.33}$ ) $_{2}$ are extremely dirty, while KFe $_{2}$ As $_{2}$ can be clean. This apparently conflicting experimental data casts a serious doubt on the nodal gap possibility on LaFePO and BaFe $_{2}$ (As $_{0.67}$ P $_{0.33}$ ) $_{2}$ .

11 pages, 5 figures A new section "4. Remark on the quantum oscillation (QO) experiments" is added

Are there nodes in LaFePO, BaFe $_{2}$ (AsP) $_{2}$ , and KFe $_{2}$ As $_{2}$ ?

Abstract

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Are there nodes in LaFePO, BaFe2​(AsP)2​, and KFe2​As2​ ?

Abstract

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Cited by in corpus (6)

Are there nodes in LaFePO, BaFe $_{2}$ (AsP) $_{2}$ , and KFe $_{2}$ As $_{2}$ ?