2013/11/14 by M. Zehetmayer, J. Hecher · 1 citation
Physics and Astronomy · #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-2048/27/4/044006
published as Supercond. Sci. Technol. 27 044006 (2014) · 7 pages, 4 figures, to be published in SUST
arxiv created 2013/11/14 · arxiv updated 2014/03/28
Is V3Si a two-band or a single-band superconductor? Everyone who searches the literature for this question will find conflicting answers, for V3Si was claimed to be a perfect example of two-band and claimed to be a perfect example of single-band superconductivity. In this article we intend to clarify the situation by presenting new experimental facts acquired from the magnetic properties of a V3Si single crystal. We probe for field dependent two-band effects by analyzing the reversible magnetization at different temperatures, and we probe for temperature dependent two-band effects by analyzing the superfluid density obtained by two different methods at different magnetic fields. All our results are reliably described within the single-band models and thus support the single-band scenario for V3Si but do not completely rule out the presence of a very small second gap.