2003/04/30 by M. Matsumoto, Masashige Matsumoto, Cyril Belardinelli +1
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Critical field #Field (mathematics) #Magnetic and transport properties of perovskites and related materials #Magnetic field #Materials science #Nucleation #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Sublinear function #Superconductivity #Thermodynamics #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.72.1623
published as J. Phys. Soc. Jpn. Vol. 72, 1623-1626 (2003) · 4 pages, 3 figures
openalex publication_date 2003/07/15 · arxiv created 2003/08/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The inhomogeneous 3 Kelvin phase is most likely a superconducting state nucleating at the interface between micrometer-sized Ru-metal inclusions and Sr2RuO4 above the bulk onset of superconductivity. This filamentary superconducting state yields a characteristic temperature dependence of the upper critical field which is sublinear, i.e., Hc2 (T) ∝ (T^* - T)γ with 0.5 ≤ γ < 1 (T^*: nucleation temperature). The Ginzburg-Landau theory is used to analyze the behavior of the nucleated spin-triplet phase in a field and the characteristic features of Hc2 observed in the experiment are explained based on a two-component order parameter in the presence of a filament of enhanced superconductivity with a finite width.