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.

5 pages 4 figures

References in corpus (7)

• Fermi surface and quasiparticle dynamics of Na(x)CoO2 {x=0.7} investigated by Angle-Resolved Photoemission Spectroscopy
• Fermi surface evolution and Luttinger theorem in Na${}_x$CoO${}_2$: a systematic photoemission study
• Ferromagnetic fluctuation and possible triplet superconductivity in Na_xCoO_2*yH_2O: Fluctuation-exchange study of multi-orbital Hubbard model
• Electron correlation and Fermi surface topology of Na${}_x$CoO${}_2$
• Spin singlet pairing in the superconducting state of NaxCoO2\cdot1.3H2O: evidence from a ^{59}Co Knight shift in a single crystal
• The Fermi surface of Na${}_x$CoO${}_2$
• Quasiparticle coherence and the nature of the metal-insulator phase transition in Na${}_x$CoO${}_2$

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• Complete d-Band Dispersion and the Mobile Fermion Scale in NaxCoO2
• 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
• 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 $0.71\le x\le 0.84$
• The low-energy ARPES and heat capacity of Na${}_{0.3}$CoO${}_2$: A DMFT study
• Charge and spin order on the triangular lattice -- Na${}_x$CoO${}_2$ at $x=0.5$
• Itinerant in-plane magnetic fluctuations and many-body correlations in Na${}_x$CoO${}_2$
• Coulomb correlations do not fill the e'_g hole pockets in Na_{0.3}CoO_2
• Sodium Trimer Ordering on NaxCoO2 Surface
• The electronic structure of the Na${}_x$CoO${}_2$ surface
• Electron-phonon interaction in the lamellar cobaltate Na${}_x$CoO${}_2$
• Interplay between strong correlations and electronic topology in the underlying kagome lattice of Na2/3CoO2