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.Comment: 7 pages, 4 figures, to be published in SUS
