Importance of Epitaxial Strain at a Spin-Crossover Molecule–Metal Interface - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry Letters Année : 2019

Importance of Epitaxial Strain at a Spin-Crossover Molecule–Metal Interface

Alessandro Coati
Yann Girard
Talal Mallah
Alexander Smogunov
Vincent Repain

Résumé

Spin-crossover molecules are very appealing for use in multifunctional spintronic devices because of their ability to switch between high-spin and low-spin states with external stimuli such as voltage and light. In actual devices, the molecules are deposited on a substrate, which can modify their properties. However, surprisingly little is known about such molecule–substrate effects. Here we show for the first time, by grazing incidence X-ray diffraction, that an FeII spin-crossover molecular layer displays a well-defined epitaxial relationship with a metal substrate. Then we show, by both density functional calculations and a mechanoelastic model, that the resulting epitaxial strain and the related internal pressure can induce a partial spin conversion at low temperatures, which has indeed been observed experimentally. Our results emphasize the importance of substrate-induced spin state transitions and raise the possibility of exploiting them.
Fichier non déposé

Dates et versions

hal-02190649 , version 1 (22-07-2019)

Identifiants

Citer

Cynthia Fourmental, Sourav Mondal, Rajdeep Banerjee, Amandine Bellec, Yves Garreau, et al.. Importance of Epitaxial Strain at a Spin-Crossover Molecule–Metal Interface. Journal of Physical Chemistry Letters, 2019, 10 (14), pp.4103-4109. ⟨10.1021/acs.jpclett.9b01303⟩. ⟨hal-02190649⟩
70 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More