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Phys. Rev. B 78, 100505(R) (2008) [4 pages]

Analysis of the spectral function of Nd1.85Ce0.15CuO4 obtained by angle-resolved photoemission spectroscopy

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F. Schmitt1, W. S. Lee1, D.-H. Lu2, W. Meevasana3, E. Motoyama1, M. Greven1,2, and Z.-X. Shen1,2,3
1Department of Applied Physics, Stanford University, Stanford, California 94305, USA
2Stanford Synchrotron Radiation Laboratory, Menlo Park, California 94025, USA
3Department of Physics, Stanford University, Stanford, California 94305, USA

Received 3 July 2008; revised 21 August 2008; published 15 September 2008

Samples of Nd2−xCexCuO4, an electron-doped high-temperature superconducting cuprate, near optimal doping at x=0.155 were measured via angle-resolved photoemission. We report a renormalization feature in the self-energy (“kink”) in the band dispersion at ≈50–60 meV present in nodal and antinodal cuts across the Fermi surface. Specifically, while the kink had been seen in the antinodal region, it is now observed also in the nodal region, reminiscent of what has been observed in hole-doped cuprates.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.78.100505
DOI:
10.1103/PhysRevB.78.100505
PACS:
74.72.Jt
 
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