Quantum Oscillations in the High Pressure Metallic State of Ca₂RuO₄

2012/05/14 by Swee K. Goh, Goh, Swee K., Patricia Alireza +11
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.1205.3045

openalex publication_date 2012/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We present evidence for quantum oscillations in the pressure-induced metallic state of the 4d layered perovskite Ca₂RuO₄. 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 ∼ 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.

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