LIMOT Laurent

Spin transport in organometallic wires (SPINWIRE)


Project SPINWIRE aims at exploring and then exploiting spin transport across single organometallic wires. This ambitious goal will be achieved through four innovating strategies:

1) The wires will have a simplified multi-decker architecture where single-metal atoms alternative with organic rings. Strikingly, these wires are predicted to display a 100% spin-filtering efficiency over a wide bias range.

2) Transport measurements will be carried out in a controlled environment via a low-temperature scanning tunneling microscope (STM) operated in the contact regime.

3) The chemical composition of the molecule will be customized directly in the STM junction to optimize spin transport. Moreover, the material of tip and surface will be changed to tackle different aspects of spin transport. These consist in the Kondo effect (non-magnetic tip and surface) and its interplay with spin-polarized electrons (ferromagnetic tip and a non-magnetic surface, or vice versa), as well as the realization of a single-molecule spin valve (ferromagnetic tip and surface).

4) Transport data will be highly amenable to simulation given the unprecedented microscopic control exerted over the junction and the simplified molecular architecture employed. Key spintronic properties will be unraveled through the active collaboration between the experimental STM group of the IPCMS (L. Limot) and the theory groups of the ENS-Lyon/MIT (M. L. Bocquet) and of the CIN2-ICN (N. Lorente).