Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy
Figure 8
(a) Normalized amplitude of as a function of temperature at various wavelengths. The insets illustrate splitting of the Mn3+ energy levels in the local environment MnO5 for photon energy above and below ( > ). (b) Energy gap as a function of . is estimated from the wavelengths in (a). The dashed line emphasizes linear behavior in the high-temperature range. (c) The slope of temperature-dependent normalized amplitude of in (a) (gray thick lines) as a function of at various wavelengths. The dashed line emphasizes behavior of the slope [35]. Reprinted figure with permission from Shih et al. [35]. Copyright (2009) by the American Physical Society.
