Doping and temperature dependence of electronic Raman response in cuprate superconductors
arXiv:1004.4745 · doi:10.1016/j.physleta.2010.10.062
Abstract
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.
7 pages, 5 figures, updated references, accepted for publication in Phys. Lett. A
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