Abstract
Superfluid He3 has a rich spectrum of collective modes with both massive and massless excitations. The masses of these modes can be precisely measured using acoustic spectroscopy and fit to theoretical models. Prior comparisons of the experimental results with theory did not include strong-coupling effects beyond the weak-coupling-plus BCS model, so-called nontrivial strong-coupling corrections. In this paper we utilize recent strong-coupling calculations to determine the Higgs masses and find consistency between experiments that relate them to a subdominant f-wave pairing strength.
| Original language | English (US) |
|---|---|
| Article number | 054510 |
| Journal | Physical Review B |
| Volume | 99 |
| Issue number | 5 |
| DOIs | |
| State | Published - Feb 19 2019 |
Funding
We are grateful to J. A. Sauls and J. J. Wiman for useful discussions regarding the strong-coupling corrections to the β parameters. We are also thankful to J. M. Parpia for guidance in converting ρ n / ρ to temperature. This work was supported by the National Science Foundation, Division of Materials Research (Grant No. DMR-1602542).
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics