Dr. Jan Dreiser
Swiss Light Source, Paul Scherrer Institut, WSLA/106, CH-5232 Villiguen PSI, Switzerland.
Thursday, August 31st , 11h00
Functional molecular materials such as single-molecule magnets [1], spin-crossover [2] or photomagnetic complexes [3] are attracting a lot of interest because of their potential for applications in the fields of molecular electronics and spintronics. However, in order to construct devices from them, the molecules have to be removed from their native environment and deposited as thin films or submonolayers on suitable substrates. Importantly, the properties of the molecules at such interfaces can differ greatly from the bulk molecular properties because of strong molecule-surface interactions and modified intermolecular interactions [4,5]. In many cases, these interactions have a detrimental effect, removing or weakening the desired molecular properties. Thus, in order to exploit the promising features of the molecules, a good understanding of the molecule-substrate interface is required.
In my talk I will present our recent efforts to understand and control the magnetic properties [6], the organization [7] and other properties of the adsorbed functional molecular complexes. In particular, I will highlight the exceptional properties of terbium and dysprosium double-decker molecules adsorbed on magnesium oxide thin films and report on recent experiments using ferroelectric surfaces.
References
[1] D. Gatteschi, R. Sessoli, and J. Villain, Molecular Nanomagnets (Oxford University Press, 2006).
[2] K. Senthil Kumar and M. Ruben, Coord. Chem. Rev. 346, 176 (2017).
[3] A. Bleuzen, V. Marvaud, C. Mathoniere, B. Sieklucka, and M. Verdaguer, Inorg. Chem. 48, 3453 (2009).
[4] A. Cornia and M. Mannini, in Molecular Nanomagnets and Related Phenomena, edited by S. Gao (Springer Berlin Heidelberg, 2014), pp. 293–330.
[5] J. Dreiser, J. Phys.: Condens. Matter 27, 183203 (2015).
[6] C. Wäckerlin, F. Donati, A. Singha, R. Baltic, S. Rusponi, K. Diller, F. Patthey, M. Pivetta, Y. Lan, S. Klyatskaya, M. Ruben, H. Brune, and J. Dreiser, Adv. Mater. 28, 5195 (2016).
[7] J. Dreiser, G. E. Pacchioni, F. Donati, L. Gragnaniello, A. Cavallin, K. S. Pedersen, J. Bendix, B. Delley, M. Pivetta, S. Rusponi, and H. Brune, ACS Nano 10, 2887 (2016).