Stimuli-Responsive Low-Frequency Terahertz Absorption ON-OFF Switchability in Spin-Crossover Material

© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 38 vom: 02. Sept., Seite e2507457
Auteur principal: Li, Guanping (Auteur)
Autres auteurs: Stefanczyk, Olaf, Kumar, Kunal, Guérin, Laurent, Nakamura, Kazuki, Alashoor, Maryam, Xiong, Lulu, Nakabayashi, Koji, Imoto, Kenta, Nakamura, Yuiga, Maity, Sumit Ranjan, Chastanet, Guillaume, Chilton, Nicholas F, Ohkoshi, Shin-Ichi
Format: Article en ligne
Langue:English
Publié: 2025
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article ab initio calculation photomagnetism spin‐crossover switchability terahertz spectroscopy
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520 |a Thermal and optical-induced ON-OFF switchable materials show vast potential in various fields like sensors, spintronics, and electronic devices, but remain underexplored in the essential terahertz (THz) region. In this context, a unique 1D spin-crossover (SCO) network, {[FeII(4-cyanopyridine)2][HgII(µ-SCN)2(SCN)(4-cyanopyridine)]2}n (1), has been designed. Temperature-dependent crystallographic, magnetic, and THz absorption spectroscopic studies indicate an abrupt SCO phenomenon from a high-spin (HS) state to a complete or partial low-spin (LS) state, depending on the cooling rate. At low temperatures, the LS state can be converted into the metastable HS state via the light-induced excited spin-state trapping (LIESST) effect using visible or near-infrared lights. Both temperature and light reversibly modulate the THz absorbance (e.g., 0.82 and 1.37 THz) associated with phonons around Fe(II) centers, confirmed by first-principles calculations and photocrystallographic analysis. This work advances comprehension of the intersection between structures, THz properties, and external-stimuli switching effects and is pivotal for future THz device applications 
650 4 |a Journal Article 
650 4 |a ab initio calculation 
650 4 |a photomagnetism 
650 4 |a spin‐crossover 
650 4 |a switchability 
650 4 |a terahertz spectroscopy 
700 1 |a Stefanczyk, Olaf  |e verfasserin  |4 aut 
700 1 |a Kumar, Kunal  |e verfasserin  |4 aut 
700 1 |a Guérin, Laurent  |e verfasserin  |4 aut 
700 1 |a Nakamura, Kazuki  |e verfasserin  |4 aut 
700 1 |a Alashoor, Maryam  |e verfasserin  |4 aut 
700 1 |a Xiong, Lulu  |e verfasserin  |4 aut 
700 1 |a Nakabayashi, Koji  |e verfasserin  |4 aut 
700 1 |a Imoto, Kenta  |e verfasserin  |4 aut 
700 1 |a Nakamura, Yuiga  |e verfasserin  |4 aut 
700 1 |a Maity, Sumit Ranjan  |e verfasserin  |4 aut 
700 1 |a Chastanet, Guillaume  |e verfasserin  |4 aut 
700 1 |a Chilton, Nicholas F  |e verfasserin  |4 aut 
700 1 |a Ohkoshi, Shin-Ichi  |e verfasserin  |4 aut 
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