Shubnikov de Haas effect in the metallic state of Na${}_{0.3}$CoO${}_2$

Abstract

Shubnikov de Haas oscillations for two well defined frequencies, corresponding respectively to areas of 0.8 and 1.36% of the first Brillouin zone (FBZ), were observed in single crystals of Na${}_{0.3}$CoO${}_2$. The existence of Na superstructures in Na${}_{0.3}$CoO${}_2$, coupled with this observation, suggests the possibility that the periods are due to the reconstruction of the large Fermi surface around the $\Gamma$ point. An alternative interpretation in terms of the long sought-after ${\epsilon }_g^{\prime }$ pockets is also considered but found to be incompatible with existing specific heat data.

arXiv comment5 pages 4 figures

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• Searching for Stable Na-ordered Phases in Single Crystal Samples of gamma-NaxCoO2
• Exact Diagonalization Dynamical Mean Field Theory for Multi-Band Materials: Effect of Coulomb correlations on the Fermi surface of Na_0.3CoO_2
• Can disorder alone destroy the eg' hole pockets of NaxCoO2? A Wannier function based first-principles method for disordered systems
• Elliptical hole pockets in the Fermi surfaces of unhydrated and hydrated sodium cobalt oxides
• Local moment, itinerancy and deviation from Fermi liquid behavior in Na${}_x$CoO${}_2$ for $0.71\le x\le 0.84$
• Charge and spin order on the triangular lattice -- Na${}_x$CoO${}_2$ at $x=0.5$
• The low-energy ARPES and heat capacity of Na${}_{0.3}$CoO${}_2$: A DMFT study
• Itinerant in-plane magnetic fluctuations and many-body correlations in Na${}_x$CoO${}_2$
• Fermiology via the electron momentum distribution
• Coulomb correlations do not fill the e'_g hole pockets in Na_{0.3}CoO_2
• Sodium Trimer Ordering on NaxCoO2 Surface
• Textured electronic states of the triangular lattice Hubbard model and Na${}_x$CoO${}_2$
• The electronic structure of the Na${}_x$CoO${}_2$ surface
• Electron-phonon interaction in the lamellar cobaltate Na${}_x$CoO${}_2$
• When is the Kadowaki-Woods ratio universal?
• Interplay between strong correlations and electronic topology in the underlying kagome lattice of Na2/3CoO2
• Hall effect evidence for an interplay between electronic correlations and Na order induced electronic bands topology in NaxCoO2