Multigap nodeless superconductivity in FeSex: Evidence from quasiparticle heat transport
J. K. Dong, T. Y. Guan, S. Y. Zhou, X. Qiu, L. Ding, C. Zhang, U. Patel, Z. L. Xiao, S. Y. Li
DOI 10.1103/PhysRevB.80.024518 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The in-plane thermal conductivity κ of the iron selenide superconductor FeSex (Tc=8.8 K) was measured down to 120 mK and up to 14.5 T (≃3/4Hc2). In zero field, the residual linear term κ0/T at T→0 is only about 16 μW K−2 cm−1, less than 4% of its normal-state value. Such a small κ0/T does not support the existence of nodes in the superconducting gap. More importantly, the field dependence of κ0/T in FeSex is very similar to that in NbSe2, a typical multigap s-wave superconductor. We consider our data as strong evidence for multigap nodeless (at least in ab plane) superconductivity in FeSex. This kind of superconducting gap structure may be generic for all Fe-based superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.8 | Pressure not reported | midpoint |
| FeSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.8 | Pressure not reported | unknown |
| FeSex Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | onset |
| FeSe0.85 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaNi2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.7 | Pressure not reported | unknown |
| Ba1-xKxFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| BaFe1.9Ni0.1As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20.3 | Pressure not reported | unknown |
| Tl2201 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15 | Pressure not reported | unknown |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
| Ba0.6K0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | unknown |
| BaFe1.85Co0.15As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25.5 | Pressure not reported | unknown |
Similar papers
Quasiparticle heat transport in single-crystalline Ba1−xKxFe2As2: Evidence for a k-dependent superconducting gap without nodes
similarity 0.97X. G. Luo et al.
Source status unknown — claims are unverified
Evidence for superconducting gap nodes in the zone-centered hole bands of KFe2As2 from magnetic penetration-depth measurements
similarity 0.95K. Hashimoto et al.
Source status unknown — claims are unverified
Electrodynamics of electron-doped iron pnictide superconductors: Normal-state properties
similarity 0.95N. Barišić et al.
Source status unknown — claims are unverified
Electron-boson coupling and two superconducting gaps in optimally electron-doped BaFe1.9Ni0.1As2 single crystals
similarity 0.94Zhao-Sheng Wang et al.
Source status unknown — claims are unverified
Low-Temperature Magnetothermal Transport Investigation of a Ni-Based Superconductor BaNi2As2: Evidence for Fully Gapped Superconductivity
similarity 0.94N. Kurita et al.
Source status unknown — claims are unverified
Superconducting order parameters in overdoped BaFe1.86Ni0.14As2 revealed by multiple Andreev reflection spectroscopy of planar break junctions
similarity 0.94T. E. Kuzmicheva et al.
Source status unknown — claims are unverified