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An electro-elastic theory for the mechanically-assisted photo-induced spin transition in core–shell spin-crossover nanoparticles

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Abstract

The development of heterostructure materials may lead to new features that cannot be obtained with natural materials. Here we simulate a model structurally hybrid core–shell nanoparticle with different lattice parameters between an electronically inert shell and an active spin crossover core. The nanoparticle consists of a 2D core with 20 × 20 size with square symmetry, surrounded by a shell made of 10 atomic layers. The low temperature photoexcitation of the core shows a significant environment-dependent behavior. In particular, we demonstrate that a shell with a large lattice parameter accelerates the low-spin to high-spin photoexcitation process of the core through the single domain nucleation mechanism while a moderate shell lattice parameter leads to spatially-homogeneous growth of the high-spin fraction. We found that the mechanical retro-action of the shell may cause elastic instability of the core leading to efficient control and manipulation of its photo-conversion.

Graphical abstract: An electro-elastic theory for the mechanically-assisted photo-induced spin transition in core–shell spin-crossover nanoparticles

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Publication details

The article was received on 03 Sep 2018, accepted on 29 Oct 2018 and first published on 29 Oct 2018


Article type: Paper
DOI: 10.1039/C8CP05578E
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    An electro-elastic theory for the mechanically-assisted photo-induced spin transition in core–shell spin-crossover nanoparticles

    A. Slimani and K. Boukheddaden, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C8CP05578E

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