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Optical spectroscopy and ultrafast pump-probe study on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Rh</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Se</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> : Evidence for charge density wave order formation
Here, the authors present a detailed investigation of the electrodynamic response of the ternary chalcogenide Bi${}_{2}$Rh${}_{3}$Se${}_{2}$ (of parkerite type), which is a putative charge density wave material. The study implements a combination of broadband optical conductivity and ultrafast pump-probe measurements of photoinduced changes in the reflectivity. Their measurements provide compelling …