Evidence for two energy gaps and Fermi liquid behavior in the SrPt2As2 superconductor
Xiaofeng Xu, B. Chen, W. H. Jiao, Bin Chen, C. Q. Niu, Y. K. Li, J. H. Yang, A. F. Bangura, Q. L. Ye, C. Cao, J. H. Dai, Guanghan Cao, N. E. Hussey
DOI 10.1103/PhysRevB.87.224507 · 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 report a detailed calorimetric study on single crystals of the 5d-transition metal pnictide SrPt2As2 with a superconducting critical temperature Tc∼5 K. The peculiar field dependence of the electronic specific heat coefficient γ can be decomposed into two linear components. Moreover, the temperature evolution of the electronic specific heat below Tc is best described by a two-gap model. These findings suggest that two energy gaps are associated with the superconductivity. In parallel, we show that the spin-lattice relaxation time T1, through nuclear magnetic resonance measurement, obeys the so-called Korringa relation well. This, along with the T2 dependence of resistivity at low temperatures, points to a Fermi liquid ground state in this material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrPt2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | onset |
| SrPt2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.6 | Pressure not reported | onset |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Lu2Fe3Si5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Electronic band structure, Fermi surface, and elastic properties of polymorphs of the 5.2 K iron-free superconductor SrPt2As2 from first-principles calculations
similarity 0.95I. R. Shein & A. L. Ivanovskii
Source status unknown — claims are unverified
Postquench gap dynamics of two-band superconductors
similarity 0.94Tianbai Cui et al.
Source status unknown — claims are unverified
Gap anisotropy in multiband superconductors based on multiple scattering theory
similarity 0.94Tom G. Saunderson et al.
Source status unknown — claims are unverified
Stability limits of flux states in two-band superconductor rings
similarity 0.94Leonardo Rodrigues Cadorim et al.
Source status unknown — claims are unverified
Magnetic-field-induced gapless state in multiband superconductors
similarity 0.94Victor Barzykin
Source status unknown — claims are unverified
Pressure Induced Effects on the Fermi Surface of Superconducting 2H−NbSe2
similarity 0.94H. Suderow et al.
Source status unknown — claims are unverified