We have observed cyclotron resonance in the layered perovskite superconductor Sr2RuO4. We obtain cyclotron masses for the α, β, and γ Fermi surfaces of (4.33±0.05)me, (5.81±0.05)me, and (9.71±0.2)me, respectively. The appreciable differences between these results and those obtained from de Haas–van Alphen measurements are attributable to strong electron-electron interactions in this system. Our findings appear to be consistent with predictions for an interacting Fermi liquid; indeed, semiquantitative agreement is obtained for the electron pockets β and γ.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)