Phenomenological description of the two energy scales in underdoped superconducting cuprates

Abstract

Raman and ARPES experiments have demonstrated that in superconducting underdoped cuprates nodal and antinodal regions are characterized by two energy scales instead of the one expected in BCS. The nodal scale decreases with underdoping while the antinodal one increases. Contrary to the behavior expected for an increasing energy scale, the antinodal Raman intensity decreases with decreasing doping. Using the Yang, Rice and Zhang (YRZ) model, we show that these features are a consequence of the non-conventional nature of the superconducting state in which superconductivity and pseudogap correlations are both present and compete for the phase space.

5 pages, 4 eps figures. Final version to be published in Phys. Rev. Letters

References in corpus (4)

• Inelastic Light Scattering From Correlated Electrons
• Distinct Fermi-Momentum Dependent Energy Gaps in Deeply Underdoped Bi2212
• A Phenomenological Theory of The Pseudogap State
• Two Energy Scales and two Quasiparticle Dynamics in the Superconducting State of Underdoped Cuprates

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