21 citations · 77 across the 12 of their papers we have counts for
12 papers
Unusual boundary effect on coherency of two-band superconductivity
Artjom Vargunin, Küllike Rägo, Teet Örd
We demonstrate that the healing of two-band superconductivity near the surface of the system is governed by length scales which are drastically different from correlation lengths.…
Shrinking of fluctuation region in a two-band superconductor
Artjom Vargunin, Teet Ord
In a two-band superconductor, two qualitatively different fluctuation modes related to the gap modules contribute to free energy and heat capacity, in addition to the phase fluctua…
Spatial correlation of fluctuations in multi-component superconducting systems
T. Örd, A. Vargunin, K. Rägo
We show that spatial variation and correlation of superconductivity fluctuations in a two-band model are scaled by two characteristic lengths. This results in substantially more co…
Two-gap superconductivity: interband interaction in the role of external field
Artjom Vargunin, Küllike Rägo, Teet Örd
We show that weak interband pair-transfer interaction affects weaker-superconductivity component of a two-gap system as an external field associated with the order parameter, simil…
Correlations of superconducting fluctuations in a two-gap system
Artjom Vargunin, Teet Örd
We derive analytically the spatial correlation functions for gap fluctuations in two-band scenario with intra- and interband pair-transfer interactions. These functions demonstrate…
Band filling effects on coherence lengths and penetration depth in the two-orbital negative-U Hubbard model of superconductivity
Grzegorz Litak, Teet Örd, Küllike Rägo +1
The two-orbital superconducting state is modeled by on-site intra-orbital negative-U Hubbard correlations together with inter-orbital pair-transfer interactions. The critical tempe…