Characteristic Energy of the Coulomb Interactions and the Pileup of States

Autor: Mazur, Daniel, Gray, K. E., Zasadzinski, J. F., Ozyuzer, L., Beloborodov, I. S., Zheng, H., Mitchell, J. F.
Rok vydání: 2007
Předmět:
Zdroj: Phys. Rev. B 76, 193102 (2007)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevB.76.193102
Popis: 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.
Comment: 4 pages, 4 figures, submitted to PRL
Databáze: arXiv