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arXiv · 0708.0950

Characteristic Energy of the Coulomb Interactions and the Pileup of States

Daniel Mazur·K. E. Gray·J. F. Zasadzinski·L. Ozyuzer·I. S. Beloborodov·H. Zheng·J. F. Mitchell
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Abstract

Tunneling data on $\mathrm{La_{1.28}Sr_{1.72}Mn_2O_7}$ crystals confirm Coulomb interaction effects through the $\sqrt{\mathrm{E}}$ dependence of the density of states. Importantly, the data and analysis at high energy, E, show a pileup of states: most of the states removed from near the Fermi level are found between ~40 and 130 meV, from which we infer the possibility of universal behavior. The agreement of our tunneling data with recent photoemission results further confirms our analysis.

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Daniel Mazur, K. E. Gray, J. F. Zasadzinski, L. Ozyuzer, I. S. Beloborodov, H. Zheng, J. F. Mitchell. 2007-08-07. Characteristic Energy of the Coulomb Interactions and the Pileup of States. https://doi.org/10.1103/physrevb.76.193102

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