Electronic Structure and Bulk Spin Valve Behavior in Ca${}_3$Ru${}_2$O${}_7$

Abstract

We report density functional calculations of the magnetic properties and Fermiology of Ca${}_3$Ru${}_2$O${}_7$. The ground state consists of ferromagnetic bilayers, stacked antiferromagnetically. The bilayers are almost but not exactly half-metallic. In the ferromagnetic state opposite spin polarizations are found for in-plane and out-of-plane transport. Relatively high out of plane conductivity is found for the majority spin, which is relatively weakly conductive in-plane. In the ground state in-plane quantities are essentially the same, but the out of plane transport is strongly reduced.

5 pages

References in corpus (5)

• Magnetic Phase Diagram of Ca2-xSrxRuO4 Governed by Structural Distortions
• Pressure-Tuned Collapse of the Mott-Like State in Ca_{n+1}Ru_nO_{3n+1} (n=1,2): Raman Spectroscopic Studies
• Colossal Magnetoresistance by Avoiding a Ferromagnetic State in the Mott System Ca3Ru2O7
• Quantum Oscillations, Colossal Magnetoresistance and Magnetoelastic Interaction in Bilayered Ca3Ru2O7
• Field-tuned Collapse of an Orbital Ordered and Spin-polarized State: Colossal Magnetoresistance in Bilayered Ruthenate

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• Existence of electron and hole pockets and partial gap opening in the correlated semimetal Ca3Ru2O7
• Complex electronic states in double layered ruthenates (Sr1-xCax)3Ru2O7
• Specific Heat of (Ca1-xSrx)3Ru2O7 Single Crystals
• Ca3(Ru1-xCrx)2O7: A new paradigm for spin valves
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• The power of flexible lattice in Ca3Ru2O7: Exquisite control of the electrical transport via anisotropic magnetostriction
• Structural and metal-insulator transitions in ionic liquid-gated Ca3Ru2O7 surface
• Photoinduced phase switching at a Mott insulator-to-metal transition
• Unrestricted Hartree-Fock Analysis of Sr${}_{3-x}$Ca${}_x$Ru${}_2$O${}_7$