Size-dependent vibronic coupling in α-Fe2O3

Source Publication (e.g., journal title)

The Journal of Chemical Physics

Authors

Kenneth Robert O'NealFollow
J M. Patete, State University of New York at Stony Brook
P Chen, University of Tennessee, Knoxville
Brian S. Holinsworth, University of Tennessee, Knoxville
J M. Smith, State University of New York at Stony Brook
Sang-Wook Cheong, Pohang University of Science and Technology, Korea
S S. Wong, State University of New York at Stony Brook
C Marques, SUNY Stony Brook
M C. Aronson, SUNY Stony Brook
Janice L. Musfeldt, University of Tennessee, Knoxville

Document Type

Article

Publication Date

7-28-2014

DOI

10.1063/1.4887359

Abstract

We report the discovery of finite length scale effects on vibronic coupling in nanoscale α-Fe2O3 as measured by the behavior of vibronically activated d-d on-site excitations of Fe3+ as a function of size and shape. An oscillator strength analysis reveals that the frequency of the coupled symmetry-breaking phonon changes with size, a crossover that we analyze in terms of increasing three-dimensional character to the displacement pattern. These findings demonstrate the flexibility of mixing processes in confined systems and suggest a strategy for both enhancing and controlling charge-lattice interactions in other materials.

Recommended Citation

O'Neal, Kenneth Robert; Patete, J M.; Chen, P; Holinsworth, Brian S.; Smith, J M.; Cheong, Sang-Wook; Wong, S S.; Marques, C; Aronson, M C.; and Musfeldt, Janice L., "Size-dependent vibronic coupling in α-Fe2O3" (2014). Chemistry Publications and Other Works.
https://trace.tennessee.edu/utk_chempubs/58

Submission Type

Post-print