Fermi surface reconstruction in high-Tc superconductors

Details Fermi surface reconstruction in high-Tc superconductors Fermi surface reconstruction in high-Tc superconductors

2009-01-15

arxiv.org/abs/0901.2313v1

Journal of Physics : Condensed Matter 21, 164212 (2009)

Physics

Condensed Matter

Superconductivity

To appear in the proceedings of LT25 (Amsterdam, August 2008)

Scientific paper

10.1088/0953-8984/21/16/164212

The recent observation of quantum oscillations in underdoped high-Tc superconductors, combined with their negative Hall coefficient at low temperature, reveals that the Fermi surface of hole-doped cuprates includes a small electron pocket. This strongly suggests that the large hole Fermi surface characteristic of the overdoped regime undergoes a reconstruction caused by the onset of some order which breaks translational symmetry. Here we consider the possibility that this order is "stripe" order, a form of charge / spin modulation observed most clearly in materials like Eu-doped and Nd-doped LSCO. In these materials, the onset of stripe order is indeed the cause of Fermi-surface reconstruction. We identify the critical doping where this reconstruction occurs and show that the temperature dependence of transport coefficients at that doping is typical of metals at a quantum critical point. We discuss how the pseudogap phase may be a fluctuating precursor of the stripe-ordered phase.

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