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Nat Commun. 2011 Sep 13;2:471. doi: 10.1038/ncomms1468.

Chemical potential oscillations from nodal Fermi surface pocket in the underdoped high-temperature superconductor YBa₂Cu₃O(₆+x).

Nature communications

Suchitra E Sebastian, N Harrison, M M Altarawneh, Ruixing Liang, D A Bonn, W N Hardy, G G Lonzarich

Affiliations

  1. Cavendish Laboratory, Cambridge University, Madingley Road, JJ Thomson Avenue, Cambridge CB3OHE, UK. [email protected]

PMID: 21915113 DOI: 10.1038/ncomms1468

Abstract

The electronic structure of the normal state of the underdoped cuprates has thus far remained mysterious, with neither the momentum space location nor the charge carrier type of constituent small Fermi surface pockets being resolved. Whereas quantum oscillations have been interpreted in terms of a nodal-antinodal Fermi surface including electrons at the antinodes, photoemission indicates a solely nodal density-of-states at the Fermi level. Here we examine both these possibilities using extended quantum oscillation measurements. Second harmonic quantum oscillations in underdoped YBa₂Cu₃O(₆+x) are shown to arise chiefly from oscillations in the chemical potential. We show from the relationship between the phase and amplitude of the second harmonic with that of the fundamental quantum oscillations that there exists a single carrier Fermi surface pocket, likely located at the nodal region of the Brillouin zone, with the observed multiple frequencies arising from warping, bilayer splitting and magnetic breakdown.

References

  1. Philos Trans A Math Phys Eng Sci. 2011 Apr 28;369(1941):1687-711 - PubMed
  2. Nature. 2008 Jul 10;454(7201):200-3 - PubMed
  3. Phys Rev Lett. 2009 Oct 9;103(15):157003 - PubMed
  4. Phys Rev Lett. 2008 May 9;100(18):187005 - PubMed
  5. Phys Rev B Condens Matter. 1996 Oct 1;54(14):9977-9987 - PubMed
  6. Nature. 2007 Nov 22;450(7169):533-6 - PubMed
  7. Nat Commun. 2011 Aug 16;2:432 - PubMed
  8. Nature. 2007 May 31;447(7144):565-8 - PubMed
  9. Proc Natl Acad Sci U S A. 2008 Jul 1;105(26):8835-9 - PubMed
  10. J Phys Condens Matter. 2009 Mar 11;21(10):103202 - PubMed
  11. Science. 1999 Jan 1;283(5398):49-52 - PubMed
  12. Phys Rev Lett. 2011 Jun 3;106(22):226402 - PubMed

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