Fully gapped superconductivity in SrNi2P2
Nobuyuki Kurita, Filip Ronning, Corneliu F. Miclea, Eric D. Bauer, Krzysztof Gofryk, J. D. Thompson, Roman Movshovich
DOI 10.1103/PhysRevB.83.094527 · 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
We investigated the superconducting gap structure of SrNi2P2 (Tc=1.4 K) via low-temperature magnetothermal conductivity κ(T,H) measurements. Zero field thermal conductivity κ decreases exponentially κ∝ exp(−aTc/T) with a= 1.5, in accord with the BCS theory, and rolls over to a phonon-like κ∝T3 behavior at low temperature, similar to a number of conventional s-wave superconductors. In addition, we observed a “concave” field dependence of the residual linear term κ0(H)/T. These facts strongly rule out the presence of nodes in the superconducting energy gap of SrNi2P2. Together with a fully gapped Fermi surface in the superconducting state of BaNi2As2 (Tc= 0.6–0.7 K), demonstrated in our recent work, these results lead us to stipulate that fully gapped superconductivity is likely to be a universal feature of Ni-based pnictide superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrNi2P2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | Pressure not reported | unknown |
| SrNi2P2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.4 | 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 |
| 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 |
| BaFe1.84Co0.16As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | unknown |
Similar papers
Superconductivity and the effects of pressure and structure in single-crystalline SrNi2P2
similarity 0.95F. Ronning et al.
Source status unknown — claims are unverified
High-resolution measurements of the thermal expansion of superconducting Co-doped BaFe2As2
similarity 0.94M. S. da Luz et al.
Source status unknown — claims are unverified
Superconducting gap symmetry in the superconductor BaFe1.9Ni0.1As2
similarity 0.94T. E. Kuzmicheva et al.
Source status unknown — claims are unverified
Tuning the structure and superconductivity of SrNi2P2 by Rh substitution
similarity 0.94J. Schmidt et al.
Source status unknown — claims are unverified
Crossover from weak to strong pairing in unconventional superconductors
similarity 0.94D. S. Inosov 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 0.93N. Kurita et al.
Source status unknown — claims are unverified