%0 Journal Article
%T Quantum Oscillations in the High Pressure Metallic State of Ca$_2$RuO$_4$
%A Swee K. Goh
%A P. L. Alireza
%A Lina E. Klintberg
%A T. Murphy
%A F. Nakamura
%A David J. Singh
%A Mike Sutherland
%J Physics
%D 2012
%I arXiv
%X We present evidence for quantum oscillations in the pressure-induced metallic state of the 4$d$ layered perovskite Ca$_2$RuO$_4$. A complicated oscillation spectrum is observed, which is both temperature and field dependent, with unusually light cyclotron masses in the range of $m^*/m_e$ $\sim$ 0.6 -- 3, suggesting that the pressure-induced metallic state is a weakly correlated Fermi liquid. We compare our observations to band structure calculations within the local spin density approximation, and conclude that some features of the spectrum are a result of non-linear spin splitting effects.
%U http://arxiv.org/abs/1205.3045v1