Quasiparticle scattering interference in electron-doped cuprate superconductors |
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Authors: | Shu-Hua Wang Shuang-Sheng Yang Huai-Song Zhao Feng Yuan |
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Institution: | College of Physics, Qingdao University, Qingdao 266071, China |
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Abstract: | By considering the nonmonotonic d-wave gap effect, the energy and momentum dependence of quasiparticle scattering interference is studied in the presence of a single impurity. It is shown that the pattern of the quasiparticle scattering peaks in the full Brillouin zone of electron-doped cuprate superconductors is very different from that in the hole-doped case described by the Octet model. This difference is the result of the nonmonotonic d-wave superconducting gap in the electron-doped case. As the energy increases, the position of the local peaks in the Brillouin zone moves rapidly. In particular, the characteristic peaks of the electron-doped cuprate superconductors appear between the antinodal and nodal directions, unlike in the hole-doped case. |
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Keywords: | cuprate superconductors |
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