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Surface-mediated spin locking and thermal unlocking in a 2D molecular array
- 1.0583162 - FZÚ 2024 RIV US eng J - Journal Article
Cojocariu, I. - Windischbacher, A. - Baranowski, D. - Jugovac, M. - de Campos Ferreira, Rodrigo Cezar - Doležal, Jiří - Švec, Martin - Zamalloa-Serrano, J.M. - Tormen, M. - Schio, L. - Floreano, L. - Dreiser, J. - Puschnig, P. - Feyer, V. - Schneider, C.M.
Surface-mediated spin locking and thermal unlocking in a 2D molecular array.
Advanced Science. Roč. 10, č. 22 (2023), č. článku 2300223. E-ISSN 2198-3844
Institutional support: RVO:68378271
Keywords : molecules * spin * bistability * XMCD * SPM * XPS * NEXAFS * DFT
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 15.1, year: 2022
Method of publishing: Open access
Molecular devices may take advantage of surface-mediated spin state bistability. Whereas different spin states in conventional spin crossover complexes are only accessible at low temperatures, and the lifetimes of the high-spin state are relatively short, a different behavior exhibited by prototypical nickel phthalocyanine is shown here. Direct interaction of the organometallic complex with a copper metal electrode mediates the coexistence of a high spin and a low spin state within the 2D molecular array. The spin state bistability is extremely non-volatile and it originates from the surface-induced axial displacement of the nickel cores. Spin state unlocking and the full conversion to the low spin state are only possible by annealing. This spin state transition is accompanied by distinct changes in the molecular electronic structure that might facilitate the state readout at room temperature, as evidenced by valence spectroscopy.
Permanent Link: https://hdl.handle.net/11104/0351154
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