G Cao et al 2004 New J. Phys. 6 159 doi:10.1088/1367-2630/6/1/159
Orbitally driven behaviour: Mott transition, quantum oscillations and colossal magnetoresistance in bilayered Ca3Ru2O7
Focus on Orbital PhysicsG Cao1, X N Lin1, L Balicas2, S Chikara1, J E Crow2,3 and P Schlottmann2,3
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We report recent transport and thermodynamic experiments over a wide range of temperatures for the Mott-like system Ca3Ru2O7 at high magnetic fields, B(≤ 30 T). This work reveals a rich and highly anisotropic phase diagram, where applying B along the a-, b-, and c-axis leads to vastly different behaviour. A fully spin-polarized state via a first-order metamagnetic transition is obtained for B ≥ 6 T and B||a, and colossal magnetoresistance is seen for B||b, and quantum oscillations in the resistivity are observed for B||c, respectively. The interplay of the lattice, orbital and spin degrees of freedom are believed to give rise to this strongly anisotropic behaviour.
- PACS
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75.47.Gk Colossal magnetoresistance
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
- Subjects
- Dates
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Issue 1 (November 2004)
Received 26 July 2004
Published 5 November 2004
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Orbitally driven behaviour: Mott transition, quantum oscillations and colossal magnetoresistance in bilayered Ca3Ru2O7
G Cao et al 2004 New J. Phys. 6 159
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