Fermi Surface Evolution in an Electron-Doped High-Tc Superconductor Revealed by Magnetic Quantum Oscillations

Abstract

We report on the direct probing of the Fermi surface in the bulk of the electron-doped superconductor Nd${}_{2-x}$Ce${}_x$CuO${}_4$ 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 $(\pi /a,\pi /a)$ ordering, known to exist at low doping levels, survives up to the overdoped superconducting regime.

12 pages, 4 figures; submitted to PRL

References in corpus (5)

• Quantum Oscillations in the Underdoped Cuprate YBa2Cu4O8
• Shubnikov-de Haas oscillations in YBa_2Cu_4O_8
• Algebraic charge liquids
• Magnetic-field-enhanced incommensurate magnetic order in the underdoped high-temperature superconductor YBa(2)Cu(3)O(6.45)
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Cited by in corpus (1)

• On Nernst effect and quantum oscillations in NCCO