Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-05-08
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages 3 figures
Scientific paper
Ca$_3$Ru$_2$O$_7$ undergoes an antiferromagnetic transition at $T_{\text{N}}=56 $K, followed by a Mott-like (MI) transition at $T_{\text{MI}}=48$ K. This nonmetallic ground state, with a charge gap of 0.1 eV, is suppressed by a highly anisotropic metamagnetic transition that leads to a fully spin-polarized metallic state. We report the observation of Shubnikov-de Haas oscillations in the \textit{gapped} state, colossal magnetoresistance in the inter-plane resistivity with a large anisotropy different from that observed in the magnetization, and non-Fermi liquid behavior in the metallic state at high magnetic fields.
Balicas Luis
Cao Gang
Crow J. E.
Dagotto Elbio
Hill John P.
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