JOURNAL ARTICLE

Suppression of atomic displacive excitation in photo-induced A1g phonon mode of bismuth unveiled by low-temperature time-resolved x-ray diffraction.

  • Published In: Applied Physics Letters, 2023, v. 122, n. 9. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Kubota, Yuya; Tanaka, Yoshikazu; Togashi, Tadashi; Ebisu, Tomio; Tamasaku, Kenji; Osawa, Hitoshi; Wada, Tetsuya; Sugino, Osamu; Matsuda, Iwao; Yabashi, Makina 3 of 3

Abstract

The article focuses on the direct observation of ultrafast atomic motion in the photo-induced coherent A1g phonon mode of bismuth (Bi) at cryogenic temperatures using time-resolved x-ray diffraction (XRD). A novel cryostat with a polyimide film window transparent to both optical lasers and x rays enabled pump–probe XRD experiments below 10 K, revealing that atomic displacement associated with the A1g phonon mode is suppressed at low temperatures. This suppression suggests a decreased contribution of the displacive excitation of coherent phonons (DECP) mechanism in phonon generation, with impulsive excitation playing a more significant role as temperature decreases. The findings provide insights into the temperature-dependent phonon generation mechanisms in Bi and demonstrate a versatile experimental system that can facilitate further studies of quantum phenomena in condensed matter physics.

Additional Information

  • Source:Applied Physics Letters. 2023/02, Vol. 122, Issue 9, p1
  • Document Type:Article
  • Subject Area:Geology
  • Publication Date:2023
  • ISSN:0003-6951
  • DOI:10.1063/5.0136787
  • Accession Number:162581575
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