Upper Critical Field of the 3 Kelvin Phase in Sr2RuO4

Abstract

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., H_{c2} (T) \propto (T^* - T)^γ with 0.5 \leq 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 H_{c2} 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.

4 pages, 3 figures

References in corpus (6)

• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• Quasiparticle States near the Surface and the Domain Wall in a p_x\pm i p_y-Wave Superconductor
• Vortex lattice structures of Sr${}_2$RuO${}_4$
• Observation of Andreev Surface Bound States in the 3-K phase Region of Sr_2RuO_4
• Phenomenological theory of the 3 Kelvin phase in Sr2RuO4
• Interface superconductivity in the eutectic Sr2RuO4-Ru: 3-K phase of Sr2RuO4

Cited by in corpus (6)

• Evaluation of Spin-Triplet Superconductivity in Sr2RuO4
• Strong Peak in $T_c$ of Sr${}_2$RuO${}_4$ Under Uniaxial Pressure
• Tunneling properties at the interface between superconducting Sr2RuO4 and a Ru micro-inclusion
• Phase transition in the 3 Kelvin phase in the eutectic Sr2RuO4-Ru
• Large Enhancement of 3-K Phase Superconductivity in the Sr2RuO4-Ru Eutectic System by Uniaxial Pressure
• Evolution of the filamentary 3-Kelvin phase in Pb-Ru-Sr2RuO4 Josephson junctions