Anisotropic Hc2 up to 92 T and the signature of multiband superconductivity in Ca10(Pt4As8)((Fe1−xPtx)2As2)5
Eundeok Mun, Ni Ni, Jared M. Allred, Robert J. Cava, Oscar Ayala, Ross D. McDonald, Neil Harrison, Vivien S. Zapf
DOI 10.1103/PhysRevB.85.100502 · 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 upper critical fields Hc2(T) of single crystals of the superconductor Ca10(Pt4−δAs8)((Fe0.97Pt0.03)2As2)5 (δ≈0.246) are determined over a wide range of temperatures down to T=1.42 K and magnetic fields of up to μ0H≃92 T. The measurements of anisotropic Hc2(T) curves are performed in pulsed magnetic fields using radio-frequency contactless penetration depth measurements for magnetic field applied both parallel and perpendicular to the ab plane. Whereas a clear upward curvature in Hc2∥c(T) along H∥c is observed with decreasing temperature, the Hc2∥ab(T) along H∥ab shows a flattening at low temperatures. The rapid increase of the Hc2∥c(T) at low temperatures suggests that the superconductivity can be described by two dominating bands. The anisotropy parameter γH≡Hc2∥ab/Hc2∥c is ∼7 close to Tc and decreases considerably to ∼1 with decreasing temperature, showing rather weak anisotropy at low temperatures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ca10(Pt4-δAs8)((Fe0.97Pt0.03)2As2)5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26.5 | Pressure not reported | onset |
| LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Anisotropic determined up to 92 T and the signature of multi-band superconductivity in Ca(PtAs)((FePt)As) superconductor
similarity 0.94Eundeok Mun et al. · 2012 · arXiv:1202.5011
Source status unknown — claims are unverified
Doping-dependent superconducting gap anisotropy in the two-dimensional pnictide Ca10(Pt3As8)[(Fe1−xPtx)2As2]5
similarity 0.94K. Cho et al.
Source status unknown — claims are unverified
Atomically imaged crystal structure and normal-state properties of superconducting Ca10Pt4As8((Fe1−xPtx)2As2)5
similarity 0.94Zhen Wang et al.
Source status unknown — claims are unverified
Superconducting and tetragonal-to-orthorhombic transitions in single crystals of FeSe1−xTex (0≤ x ≤0.61)
similarity 0.94Kotaro Terao et al.
Source status unknown — claims are unverified
Extraordinary Doping Effects on Quasiparticle Scattering and Bandwidth in Iron-Based Superconductors
similarity 0.93Z. R. Ye et al.
Source status unknown — claims are unverified
Superconductivity in the two-band Hubbard model
similarity 0.93Akihisa Koga & Philipp Werner
Source status unknown — claims are unverified