Evolution of the Fermi Surface of the Electron-Doped High-Temperature Superconductor Nd2-xCexCuO4 Revealed by Shubnikov-de Haas Oscillations

T. Helm; M. V. Kartsovnik; M. Bartkowiak; N. Bittner; M. Lambacher; A. Erb; J. Wosnitza; R. Gross

doi:10.1103/PhysRevLett.103.157002

Evolution of the Fermi Surface of the Electron-Doped High-Temperature Superconductor Nd2-xCexCuO4 Revealed by Shubnikov-de Haas Oscillations

T. Helm, M. V. Kartsovnik, M. Bartkowiak, N. Bittner, M. Lambacher, A. Erb, J. Wosnitza, R. Gross

Chair of Technical Physics

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126 Scopus citations

Abstract

We report on the direct probing of the Fermi surface in the bulk of the electron-doped superconductor Nd2-xCexCuO4 at different doping levels by means of magnetoresistance quantum oscillations. Our data reveal a sharp qualitative change in the Fermi surface topology, due to translational symmetry breaking in the electronic system which occurs at a critical doping level significantly exceeding the optimal doping. This result implies that the (π/a, π/a) ordering, known to exist at low doping levels, survives up to the overdoped superconducting regime.

Original language	English
Article number	157002
Journal	Physical Review Letters
Volume	103
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.103.157002
State	Published - 5 Oct 2009

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abstract = "We report on the direct probing of the Fermi surface in the bulk of the electron-doped superconductor Nd2-xCexCuO4 at different doping levels by means of magnetoresistance quantum oscillations. Our data reveal a sharp qualitative change in the Fermi surface topology, due to translational symmetry breaking in the electronic system which occurs at a critical doping level significantly exceeding the optimal doping. This result implies that the (π/a, π/a) ordering, known to exist at low doping levels, survives up to the overdoped superconducting regime.",

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AU - Helm, T.

AU - Kartsovnik, M. V.

AU - Bartkowiak, M.

AU - Bittner, N.

AU - Lambacher, M.

AU - Erb, A.

AU - Wosnitza, J.

AU - Gross, R.

PY - 2009/10/5

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N2 - We report on the direct probing of the Fermi surface in the bulk of the electron-doped superconductor Nd2-xCexCuO4 at different doping levels by means of magnetoresistance quantum oscillations. Our data reveal a sharp qualitative change in the Fermi surface topology, due to translational symmetry breaking in the electronic system which occurs at a critical doping level significantly exceeding the optimal doping. This result implies that the (π/a, π/a) ordering, known to exist at low doping levels, survives up to the overdoped superconducting regime.

AB - We report on the direct probing of the Fermi surface in the bulk of the electron-doped superconductor Nd2-xCexCuO4 at different doping levels by means of magnetoresistance quantum oscillations. Our data reveal a sharp qualitative change in the Fermi surface topology, due to translational symmetry breaking in the electronic system which occurs at a critical doping level significantly exceeding the optimal doping. This result implies that the (π/a, π/a) ordering, known to exist at low doping levels, survives up to the overdoped superconducting regime.

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Evolution of the Fermi Surface of the Electron-Doped High-Temperature Superconductor Nd2-xCexCuO4 Revealed by Shubnikov-de Haas Oscillations

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