Quasiparticle scattering interference in electron-doped cuprate superconductors

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 supe...

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Veröffentlicht in:Frontiers of physics 2015-12, Vol.10 (6), p.109-116, Article 107405
Hauptverfasser: Wang, Shu-Hua, Yang, Shuang-Sheng, Zhao, Huai-Song, Yuan, Feng
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Sprache:eng
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Zusammenfassung: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.
ISSN:2095-0462
2095-0470
DOI:10.1007/s11467-015-0521-x