Journal
PHYSICAL REVIEW B
Volume 79, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.144517
Keywords
bismuth compounds; Fermi surface; gadolinium compounds; high-temperature superconductors; lanthanum compounds; neodymium compounds; quasiparticles; strontium compounds; superconducting energy gap
Funding
- DOE Office of Basic Energy Science, Division of Materials Science and Engineering [DE-FG03-01ER45929-A001]
- Institute of Material Structure Science, KEK [2006S2-001]
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How out-of-plane disorder affects the electronic structure has been investigated for the single-layer cuprates Bi2Sr1.6L0.4CuO6+delta (L=La, Nd, and Gd) by angle-resolved photoemission spectroscopy. We have observed that, with increasing disorder, while the Fermi-surface shape and band dispersions are not affected, the quasiparticle width increases, the antinodal gap is enhanced and the superconducting gap in the nodal region is depressed. The results indicate that the superconductivity is significantly depressed by out-of-plane disorder through the enhancement of the antinodal gap and the depression of the superconducting gap in the nodal region.
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