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説明:

The elastic interaction causes a two-step conversion from the low-spin (LS) to the high-spin state (HS) following a femtosecond laser pulse excitation. These steps occur on different
timescales: a spin conversion (elastic step) in a short time due to pressure propagation and a late spin conversion (thermal step) resulting from heat diffusion. In this paper, we provide a
brief review of models for spin crossover phenomena, emphasizing the role of the difference of degeneracy of the HS state and LS state and elastic interaction due to changes in local
structures. We also review theoretical approaches to these effects. Additionally, to analyze the dynamical process of spin conversion after photo-irradiation, it is necessary to consider
mechanisms of heat transfer among spins. Recently, we proposed a two-temperature model that incorporates both lattice and spin temperatures, which enables us to reproduce
the two steps under an early uniformization of the lattice temperature, highlighting the importance of the timescales of these processes. Furthermore, we explore possible mechanisms to separate the two steps by examining the different timescales of processes of spin conversions by mechanical and entropic forces, and also by considering changes of local temperature due to spin conversion.

権利情報:

• In Copyright
  

  This is the peer reviewed version of the following article: S. Miyashita, M. Nishino, C. Enachescu, Eur. J. Inorg. Chem. 2024, e202400656., which has been published in final form at https://doi.org/10.1002/ejic.202400656. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

キーワード: elastic interaction, Elastic Step, Thermal Step, two-temperature model, modeling of spin crossover phenomena

刊行年月日: 2024-12-20

出版者: Wiley

掲載誌:

• European Journal of Inorganic Chemistry (ISSN: 14341948) issue. e202400656

研究助成金:

• MEXT 18K03444

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5125

公開URL: https://doi.org/10.1002/ejic.202400656

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更新時刻: 2025-10-28 08:30:24 +0900

MDRでの公開時刻: 2025-10-28 08:16:29 +0900