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American Physical Society, Physical review B, 15(89), 2014

DOI: 10.1103/physrevb.89.155115

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Phonon-assisted optical excitation in the narrow bandgap Mott insulator Sr3Ir2O7

Journal article published in 2014 by H. J. Park, C. H. Sohn, D. W. Jeong, G. Cao, K. W. Kim, S. J. Moon, Hosub Jin, Deok-Yong Cho, T. W. Noh
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This paper is available in a repository.

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Abstract

We examined the temperature (T) evolution of the optical conductivity spectra of Sr$_3$Ir$_2$O$_7$ over a wide range of 10-400 K. The system was barely insulating, exhibiting a small indirect bandgap of $∼$0.1 eV. The low-energy features of the optical d-d excitation (${\hbar}{ω}$ $