Bulk electronic structures and strong electron phonon interactions in an electron-doped high-temperature superconductor

Details Bulk electronic structures and strong electron phonon interactions in an electron-doped high-temperature superconductor Bulk electronic structures and strong electron phonon interactions in an electron-doped high-temperature superconductor

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10g3005t&link_type=abstract

New Journal of Physics, Volume 10, Issue 7, pp. 073005 (2008).

Physics

10

Scientific paper

We have performed soft x-ray angle-resolved photoemission spectroscopy (ARPES) for the electron-doped high-temperature superconducting cuprates (HTSCs) Nd2-xCexCuO4 (x=0.075 and 0.15) in order to disclose their genuine bulk electronic structures. Our soft x-ray ARPES has revealed that the bulk-derived nodal 'kink' (the abrupt change of the electron velocity in quasiparticle dispersions), being absent in the low-energy ARPES, is clearly observable for the electron-doped superconducting Nd1.85Ce0.15CuO4. This result confirms that the antiferromagnetic spin correlation is suppressed and the electron phonon interactions are prevailing in the bulk of the electron-doped superconducting Nd2- xCexCuO4 at the optimal doping level. The nodal 'kink' behavior is equivalent to that observed in the hole-doped HTSCs. The anisotropic strong electron phonon interactions seem to be inherent in the HTSCs irrespective of the type of doped carriers.

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