Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-07-31
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 5 figures, to be published in PRB
Scientific paper
10.1103/PhysRevB.76.064530
The 18.5 K superconductor PuCoGa5 has many unusual properties, including those due to damage induced by self-irradiation. The superconducting transition temperature decreases sharply with time, suggesting a radiation-induced Frenkel defect concentration much larger than predicted by current radiation damage theories. Extended x-ray absorption fine-structure measurements demonstrate that while the local crystal structure in fresh material is well ordered, aged material is disordered much more strongly than expected from simple defects, consistent with strong disorder throughout the damage cascade region. These data highlight the potential impact of local lattice distortions relative to defects on the properties of irradiated materials and underscore the need for more atomic-resolution structural comparisons between radiation damage experiments and theory.
Allen P. G.
Bauer Eric D.
Booth Corwin H.
Daniel Mark
Mitchell Nick J.
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