Suppression of atomic displacive excitation in photo-induced A\(_{\mathrm{1g}}\) phonon mode of bismuth unveiled by low-temperature time-resolved x-ray diffraction

An ultrafast atomic motion of a photo-induced coherent phonon of bismuth at low temperatures was directly observed with time-resolved x-ray diffraction. A cryostat with a window that is transparent to both optical lasers and x-rays enabled versatile diffraction measurements in a wide temperature ran...

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Bibliographic Details
Published in:arXiv.org 2022-11
Main Authors: Kubota, Y, Tanaka, Yoshikazu, Togashi, T, Ebisu, T, Tamasaku, K, Osawa, H, Wada, T, Sugino, O, Matsuda, I, Yabashi, M
Format: Article
Language:English
Subjects:
Bismuth
Cryogenic temperature
Displacement
Excitation
Phonons
Quantum phenomena
Raman spectra
Room temperature
Switching
Online Access:Get full text
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Summary:An ultrafast atomic motion of a photo-induced coherent phonon of bismuth at low temperatures was directly observed with time-resolved x-ray diffraction. A cryostat with a window that is transparent to both optical lasers and x-rays enabled versatile diffraction measurements in a wide temperature range including below 10 K. It is found that an atomic displacement in a fully symmetric A\(_{\mathrm{1g}}\) phonon mode is suppressed at low temperatures. This result indicates the displacive excitation process is suppressed in the phonon generation with decreasing temperature.
ISSN:2331-8422
DOI:10.48550/arxiv.2105.13146