I advance hybrid organic-inorganic interfaces (HOI) as a multifunctional new 2D object able to promote a number of spintronic functionalities and especially put the basis for new device paradigms.

Such interfaces, especially those characterised by strong hybridisation, enable a number of relevant effects detectable at both sides of the interface.

On the organic side, the first (and possibly the 2nd-3rd) molecular layer is characterised by significant spin filtering effects able not only to modify quantitatively the spin  polarisation of carriers crossing this interface but even to invert completely the spin polarization: Barraud et al (CNRS/Thales lab and CNR Bologna) Nat Phys 2010, Atodiresei et al (Hamburg-Julich) PRL 2010 etc. This property enables HOI with the functionality of controlling and tuning spin polarization in molecular based spintronic devices and possibly in inorganic GMR requiring no epitaxial quality. The modulation of this functionality by any external signal would add a new degree of freedom and may put basis to new functionalities in standard spintronic devices.

On the inorganic side, it has been shown that a "proximity" effect is established, able to modify the magnetic properties of the ferromagnetic metal in the very vicinity to the interface and further to a depth which has to be revealed yet. The first communication on this came from Raman et al. Nature 2013 (MIT, Moodera group + Julich) and was further confirmed by Paris Diderot group (PRL 114, 247203 (2015)) and Leeds-San Sebastian group (PRB 90, 125311 (2014))

Moreover, Leeds group has shown recently that a single molecular layer (C60) can transform a thin Cu layer in a ferromagnet - Nature 524, 69 (2015) !!!

This opens a number of possibilities, starting from the tuning of magnetic properties of available FM metals by simple decoration with molecules (memory applications, sensors, spintronics) to new information processing means based on the modulation of basic HOI properties by external signals.