Albert FERT Graphene Spintronics Albert Fert graduated in 1962 from the École Normale Supérieure in Paris. He received his master's degree in 1963 at the University of Paris, and earned his PhD in 1970 at the Université Paris-Sud. Currently Professor at Université Paris-Sud in Orsay and scientific director of a joint laboratory between the Centre National de la Recherche Scientifique (National Scientific Research Centre) and Thales Group. He was awarded the 2007 Nobel Prize in Physics jointly with Peter Grünberg, "for the discovery of Giant Magnetoresistance".
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Albert FERT Graphene Spintronics - European Commission · Albert FERT Graphene Spintronics Albert Fert graduated in 1962 from the École Normale Supérieure in Paris. He received
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Albert FERT Graphene Spintronics Albert Fert graduated in 1962 from the École Normale Supérieure in Paris. He
received his master's degree in 1963 at the University of Paris, and earned his
PhD in 1970 at the Université Paris-Sud.
Currently Professor at Université Paris-Sud in Orsay and scientific director of a
joint laboratory between the Centre National de la Recherche Scientifique
(National Scientific Research Centre) and Thales Group.
He was awarded the 2007 Nobel Prize in Physics jointly with Peter Grünberg,
"for the discovery of Giant Magnetoresistance".
Graphene and spintronics
Graphene 2020-opportunities for Europe
Brussels, March 21, 2011Albert Fert
UMP CNRS/Thales and University Paris-Sud
1) Graphene (or CNT) much better than classical metals andsemiconductors for spin transport to macroscopic distances and implementation of large scale spintronic logic circuits
2) Review of more sophisticated quantum effects for graphene-based spintronics
Graphene and spintronics
Graphene 2020-opportunities for Europe
Brussels, March 21, 2011Albert Fert
UMP CNRS/Thales and University Paris-Sud
F
Spin transport through a nonmagnetic lateral cchannel betwen ferromagnetic contacts
(for logic gate, logic circuit or transistor-like applications)
Theory of spin-orbit effects and spin relaxation in CNT(Huertas-Hernando et al, PR B 06, Huertas-H. et al, Eur. Phys.J.Sp.Top. 07 Bulaev et al,PR B08): main effect from curvature
Exper. (F. Kuemmeth et al, Nature 2008): level spectroscopy in Coulomb blockade regime
Carbon Nanotubes
nmmeVd
nmmevd
calccurv
/9.1
/6.1
.exp
..
=Δ
=Δ Spin-orbit Δ + scattering
spin relaxation (depending on d)
Graphene: Role of corrugation (curvature), role of scattering ?
Longer spin propagation than 100 μm ?
Next steps
Theory of spin-orbit effects and spin relaxation in CNT(Huertas-Hernando et al, PR B 06, Huertas-H. et al, Eur. Phys.J.Sp.Top. 07 Bulaev et al,PR B08): main effect from curvature
Exper. (F. Kuemmeth et al, Nature 2008): level spectroscopy in Coulomb blockade regime
Carbon Nanotubes
nmmeVd
nmmevd
calccurv
/9.1
/6.1
.exp
..
=Δ
=Δ Spin-orbit Δ + scattering
spin relaxation (depending on d)
Graphene: Role of corrugation (curvature), role of scattering ?
Longer spin propagation than 100 μm ?
Next steps
Spin manipulation by gate ?I I
F1 F2
spin gate?By ?
Proximity with a ferromagnetic material
Amplification of spin-orbit by proximity with large S-O material + Electric field or ferroelectric gate
Edges effects
Graphene and spintronics
Meeting on Graphene
Brussels, Feb. 15, 2011Albert Fert
UMP CNRS/Thales and University Paris-Sud
1) Graphene (or CNT) much better than classical metals andsemiconductors for spin transport to macroscopic distances and implementation of large scale spintronic logic circuits
2) Review of more sophisticated quantum effects for graphene-based spintronics
Conclusions
Major advantage of graphene (and CNT) over classical metals and semiconductors
(for spin transport in general)
Long spin lifetime (small spin-orbit, etc)
Large electron velocity+
Spin propagation length ≈100 μm (longer can be expected)
allowing, for example, the implementation of large scale
spintronic logic circuits
1
2 Next stage: paradigmatic concepts based on the exploitation of edge effects, proximity interactions,