Xi Graph (IMAGE)

Penn State

Xi Graph

Caption

Room-temperature Raman spectra of (1) a bare strontium titanate substrate (black curve); (2) a barium-titanate/strontium-titanate superlattice (bllue curve) measured with visible light; and (3) the same superlattice measured with ultraviolet light (red curve). The dashed black line shows the bare strontium titanate substrate spectrum measured with ultraviolet light.

Credit

Xiaoqing Pan, University of Michigan

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