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- W2935840003 abstract "We investigate the orthorhombic distortion and the structural dynamics of epitaxial MnAs layers on GaAs(001) using static and time-resolved x-ray diffraction. Laser-induced intensity oscillations of Bragg reflections allow us to identify the optical phonon associated with orthorhombic distortion and to follow its softening along the path towards an undistorted phase of hexagonal symmetry. The frequency of this mode falls in the THz range, in agreement with recent calculations. Incomplete softening suggests that the $ensuremath{beta}ensuremath{-}ensuremath{gamma}$ transformation deviates from a purely second-order displacive transition." @default.
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- W2935840003 date "2019-04-09" @default.
- W2935840003 modified "2023-10-15" @default.
- W2935840003 title "Ultrafast Structural Dynamics along the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>β</mml:mi><mml:mo>−</mml:mo><mml:mi>γ</mml:mi></mml:math> Phase Transition Path in MnAs" @default.
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- W2935840003 doi "https://doi.org/10.1103/physrevlett.122.145702" @default.
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