Molecular spintronics using single metallocenes
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Molecular spintronics using single metallocenes
DIPC Seminars
- Speaker
-
Dr. Laurent Limot, Institut de Physique et de Chimie des Matériaux de Strasbourg CNRS
- When
-
2016/05/13
14:00
- Place
- Donostia International Physics Center. Pº Manuel Lardizabal 4, Donostia - San Sebastián
- Add to calendar
-
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![Molecular spintronics using single metallocenes](/++theme++dipc-theme/img/event_image_berdea.png)
Molecular spintronics offers the unique opportunity of combining the
established advantages of a spin-based electronics with specifically designed
molecules, and thereby paves the way for the elaboration of new spin-dependent
functionalities. One of the challenges to be faced in this field is to
transpose well-known spintronic properties at the molecular level. These can
consist, for example, in using a molecule to modify the spin polarization of a
current, in controlling the orientation of the molecular spin through a
current-driven spin-transfer torque, or in realizing magnetic remanence in a
single molecule.
Here, I will present recent work devoted to metallocenes. This class of
molecules – still little explored in the context of molecular spintronics
– consists in a 3d element (Fe, Ni, Co etc.) sandwiched between two
cyclopentadienyl rings (Cp). This simplified double-decker architecture makes
metallocenes amenable to a variety of prototypical studies to be carried out
in the junction of a scanning tunneling microscope (STM). During the talk, I
will show in particular: 1) how to control the spin of a metallocene through
the hybridization with a magnetic atom (a procedure also known as spin
doping), 2) how to control the orientation of the molecular spin by means of
spin excitations produced by inelastic tunneling electrons. One of the strong
features evidenced in the latter case is the portability of the effect,
meaning that it can be produced with the metallocene placed in a variety of
metallic environments. Taking advantage of this property, I’ll show that the
functionalization of a STM tip with a metallocene can be used to sequentially
trigger two spin excitations resulting in a large enhancement of the inelastic
signal.