• Rapid Communication

Nonmonotonic dx2y2 superconducting gap in electron-doped Pr0.89LaCe0.11CuO4: Evidence of coexisting antiferromagnetism and superconductivity?

Tanmoy Das, R. S. Markiewicz, and A. Bansil
Phys. Rev. B 74, 020506(R) – Published 24 July 2006

Abstract

Recent experiments on Pr0.89LaCe0.11CuO4 observe an anisotropic spin-correlation gap and a nonmonotonic superconducting (SC) gap, which we analyze within the framework of a tttttivU model with a dx2y2 pairing interaction including a third-harmonic contribution. By introducing a realistic broadening of the quasiparticle spectrum to reflect small-angle scattering, our computations explain the experimental observations, especially the presence of a maximum in the leading-edge gap in the vicinity of the hot spots. Our analysis suggests that the material behaves like a two-band superconductor with the d-wave third harmonic acting as the interband pairing gap, and that the antiferromagnetic and SC orders coexist in a uniform phase.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 31 March 2006

DOI:https://doi.org/10.1103/PhysRevB.74.020506

©2006 American Physical Society

Authors & Affiliations

Tanmoy Das, R. S. Markiewicz, and A. Bansil

  • Physics Department, Northeastern University, Boston, Massachusetts 02115, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 74, Iss. 2 — 1 July 2006

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×