Abstract
We investigate the doping dependence of the penetration depth versus temperature in electron-doped Pr₂₋ₓCeₓCuO4-δ using a model which assumes the uniform coexistence of (mean-field) antiferromagnetism and superconductivity. Despite the presence of a dₓ2₋y2 pairing gap in the underlying spectrum, we find nodeless behavior of the low-T penetration depth in the underdoped case, in accord with experimental results. As doping increases, a linear-in-T behavior of the penetration depth, characteristic of d-wave pairing, emerges as the lower magnetic band crosses the Fermi level and creates a nodal Fermi surface pocket.
Keywords
doping dependence, nodeless behavior, Fermi level, Pr2-xCexCuO4-δ
Subject Categories
Superconductors, Antiferromagnetism
Disciplines
Physics
Publisher
American Physical Society
Publication Date
5-8-2007
Rights Information
Copyright 2007 American Physical Society.
Rights Holder
American Physical Society
Recommended Citation
Das, Tanmoy; Markiewicz, R. S.; and Bansil, A., "Nodeless d-wave superconducting pairing due to residual antiferromagnetism in underdoped Pr2-xCexCuO4-δ" (2007). Physics Faculty Publications. Paper 403.
Click button above to open, or right-click to save.
Notes
Originally published in Physical Review Letters v.98 (2007): 197004. DOI: 10.1103/PhysRevLett.98.197004