Doping and temperature dependence of electronic Raman response in cuprate superconductors

Details Doping and temperature dependence of electronic Raman response in cuprate superconductors Doping and temperature dependence of electronic Raman response in cuprate superconductors

2010-04-27

arxiv.org/abs/1004.4745v2

Physics Letters A 375, 214 (2010)

Physics

Condensed Matter

Superconductivity

7 pages, 5 figures, updated references, accepted for publication in Phys. Lett. A

Scientific paper

10.1016/j.physleta.2010.10.062

The doping and temperature dependence of the electronic Raman response in cuprate superconductors is studied within the framework of the kinetic energy driven superconducting mechanism for the t-J model. It is shown that the temperature dependent depletion at low-energy shifts is faster in B_{1g} symmetry than in B_{2g} symmetry. In analogy to the domelike shape of the doping dependent superconducting transition temperature, the pair-breaking peak energy in B_{2g} channel increases with increasing doping in the underdoped regime, and reaches a maximum in the optimal doping, then decreases in the overdoped regime. Moreover, the overall Cooper pair density increases with increasing doping in the underdoped regime.

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