Robust Nodal Superconductivity Induced by Isovalent Doping in Ba(Fe1-xRux)(2)As-2 and BaFe2(As1-xPx)(2)
SCIE
SCOPUS
- Title
- Robust Nodal Superconductivity Induced by Isovalent Doping in Ba(Fe1-xRux)(2)As-2 and BaFe2(As1-xPx)(2)
- Authors
- Qiu, X; Zhou, SY; Zhang, H; Pan, BY; Hong, XC; Dai, YF; Eom, MJ; Kim, JS; Ye, ZR; Zhang, Y; Feng, DL; Li, SY
- Date Issued
- 2012-02-28
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We present the ultra-low-temperature heat-transport study of iron-based superconductors Ba(Fe1-xRux)(2)As-2 and BaFe2(As1-xPx)(2). For optimally doped Ba(Fe0.64Ru0.36)(2)As-2, a large residual kappa(0)/T at zero field and a root H dependence of kappa(0)(H)/T are observed, which provide strong evidences for nodes in the superconducting gap. This result demonstrates one more nodal superconductor in iron pnictides. The similarities between isovalent Fe and P dopings strongly suggest that the nodal superconductivity in Ba(Fe0.64Ru0.36)(2)As-2 may have the same origin as in BaFe2(As0.67P0.33)(2). Furthermore, in underdoped Ba(Fe0.77Ru0.23)(2)As-2 and strongly underdoped BaFe2(As0.82P0.18)(2), kappa(0)/T manifests similar nodal behavior, which result shows the robustness of nodal superconductivity in the underdoped regime and puts constraint on theoretical models.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12529
- DOI
- 10.1103/PHYSREVX.2.011010
- ISSN
- 2160-3308
- Article Type
- Article
- Citation
- PHYSICAL REVIEW X, vol. 2, no. 1, 2012-02-28
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