The Stripe-Phase Quantum-Critical-Point Scenario for High-Tc Superconductors

Details The Stripe-Phase Quantum-Critical-Point Scenario for High-Tc Superconductors The Stripe-Phase Quantum-Critical-Point Scenario for High-Tc Superconductors

1998-12-16

arxiv.org/abs/cond-mat/9812279v1

Physics

Condensed Matter

Superconductivity

16 pages, 3 included figures, to be published on J. of Superconductivity

Scientific paper

A summary is given of the main outcomes of the quantum-critical-point scenario for high-$T_c$ superconductors, developed in the last few years by the Rome group. Phase separation, which commonly occurs in strongly correlated electronic systems, turns into a stripe instability when Coulomb interaction is taken into account. The stripe phase continuously connects the high doping regime, dominated by charge degrees of freedom to the low doping regime where spin degrees of freedom are most relevant. Dynamical stripe fluctuations enslave antiferromagnetic fluctuations at high doping. Critical fluctuations near the stripe instability mediate a singular interaction between quasiparticles, which is responsible for the non-Fermi liquid behavior in the metallic phase and for the Cooper pairing with d-wave symmetry in the superconducting phase.

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