Pseudogap-induced anisotropic suppression of electronic Raman response in cuprate superconductors
Abstract
It has become clear that the anomalous properties of cuprate superconductors are intimately related to the formation of a pseudogap. Within the framework of the kinetic-energy-driven superconducting mechanism, the effect of the pseudogap on the electronic Raman response of cuprate superconductors in the superconducting-state is studied by taking into account the interplay between the superconducting gap and pseudogap. It is shown that the low-energy spectra almost rise as the cube of energy in the B_{1g} channel and linearly with energy in the B_{2g} channel. However, the pseudogap is strongly anisotropic in momentum space, where the magnitude of the pseudogap around the nodes is smaller than that around the antinodes, which leads to that the low-energy spectral weight of the B_{1g} spectrum is suppressed heavily by the pseudogap, while the pseudogap has a more modest effect on the electronic Raman response in the B_{2g} orientation.
Keywords
Cite
@article{arxiv.1701.00693,
title = {Pseudogap-induced anisotropic suppression of electronic Raman response in cuprate superconductors},
author = {Pengfei Jing and Yiqun Liu and Huaisong Zhao and Lulin Kuang and Shiping Feng},
journal= {arXiv preprint arXiv:1701.00693},
year = {2017}
}
Comments
7 pages, 2 figures,added references and discussions, accepted for publication in Phil. Mag. Lett