The focus of the Collaborative Research Centre is mainly on spintronics where one attempts to employ, in addition to the elementary charge of the carriers, their magnetic moment, the spin, as information carrier. To reach this goal, efficient spin injection, spin transport and the control, manipulation and detection of spin polarisation or of spin polarised currents are essential requirements. The central problem interconnecting all projects and project areas addresses the characterisation, control and manipulation of the spin degree of freedom in electronic systems of reduced dimension. As systems of reduced dimension we consider semiconductor-heterojunctions, containing low-dimensional charge carrier systems, tunnel junctions, thin layers of ferromagnetic semiconductor material (mainly GaMnAs), being nanopatterned or embedded in semiconductor heterojunctions, as well as mesoscopic systems, point contacts or molecular systems.
The Collaborative Research Centre is grouped into the three project areas A, B, and C. Project area A includes experimental and theoretical investigations of charge transport through nanotubes, wires and molecules. In project area B the focus is on the ferromagnetic semiconductor material GaMnAs and on heterojunctions involving GaMnAs layers. Projects in this area concentrate on growth and characterisation of fundamental morphological, electrical and magnetic material properties of GaMnAs as well as on application of such layers to investigate spin injection, spin polarisation, spin dependent tunnelling or current induced magnetisation switching. Project area C finally combines experimental and theoretical explorations on spin dependent phenomena in semiconductor heterojunctions and nanostructures, ferromagnet-superconductor and ferromagnet-semiconductor hybrid structures.
The long-term objective of the Collaborative Research Centre is on realisation of effective injection, manipulation and detection of spins in systems of reduced dimension. In addition the key components of a future room temperature spintronics shall be provided.
DFG Programme
Collaborative Research Centres
Completed projects
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A01 - Spin-dependent transport in interacting carbon nanotubes
(Project Heads
Grifoni, Milena
;
Hüttel, Andreas Klaus
;
Strunk, Christoph
)
-
A02 - Spindiffusionslängen-Bestimmungen in nichtmagnetischen Nanodrähten mit beweglichen Nanokontakten
(Project Heads
Back, Christian
;
Vancea, Johann
)
-
A03 - Theoretical Investigation of Spin Dependent Transport through Carbon Nanotubes
(Project Heads
Cuniberti, Gianaurelio
;
Grifoni, Milena
)
-
A04 - Spin-dependent transport through individual molecules
(Project Heads
Donarini, Andrea
;
Grifoni, Milena
;
Repp, Jascha
;
Richter, Klaus
)
-
A06 - Spin dependent transport through individual molecules: scanning tunneling microscopy and spectroscopy
(Project Head
Repp, Jascha
)
-
A07 - Magnetism in graphene: spin transport and characterization on the atomicscale
(Project Heads
Eroms, Jonathan
;
Giessibl, Franz J.
;
Repp, Jascha
;
Strunk, Christoph
)
-
A08 - Spin effects in graphene
(Project Heads
Fabian, Jaroslav
;
Richter, Klaus
)
-
A09 - Experimental and theoretical investigations of spin-nanostructures built from single atoms
(Project Heads
Ebert, Hubert
;
Giessibl, Franz J.
)
-
A10 - Spin-dependent transport and recombination in organic semiconductors
(Project Head
Lupton, John
)
-
B01 - Molecular beam epitaxy of magnetic manganese-doped semiconductors
(Project Heads
Bougeard, Dominique
;
Schuh, Dieter
;
Wegscheider, Werner
)
-
B02 - Manipulation der statischen und dynamischen Eigenschaften von (Ga,Mn)As
(Project Heads
Back, Christian
;
Woltersdorf, Georg
)
-
B03 - Vielteilchenbeschreibung ferromagnetischer Halbleiter: Korrelationseffekte in elektrischen und magnetischen Eigenschaften
(Project Heads
Ebert, Hubert
;
Schliemann, John
)
-
B04 - Spin dynamics and spin diffusion in semiconductor heterostructures
(Project Heads
Korn, Tobias
;
Schüller, Christian
)
-
B05 - Magnetic semiconductor nanostructures: Non-equilibrium spin detection and transport
(Project Head
Weiss, Dieter
)
-
B06 - Spin injection from diluted magnetic semiconductors into semiconductor heterojunctions
(Project Heads
Back, Christian
;
Bayreuther, Günther
;
Ciorga, Mariusz
;
Weiss, Dieter
)
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B08 - Elektronenmikroskopische strukturelle und mikromagnetische Charakterisierung von magnetischen Halbleitern
(Project Head
Zweck, Josef
)
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B09 - Modeling and simulation of magnetic semiconductor device structures
(Project Heads
Fabian, Jaroslav
;
Kramer, Tobias
)
-
B11 - MBE Wachstum von ferromagnetischen Nanodrähten
(Project Heads
Bougeard, Dominique
;
Reiger, Elisabeth
;
Schuh, Dieter
;
Zweck, Josef
)
-
B12 - Disorder in ferromagnetic semiconductors
(Project Heads
Schliemann, John
;
Wenk, Paul Thomas
)
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C01 - Spin Ratchet Effects and Resonant Spin Currents in Semiconductor Heterostructures and Hybrid Systems
(Project Head
Ganichev, Sergey
)
-
C02 - Rein elektrische Spininjektion durch Spin-Bahn-Wechselwirkung in gyrotropen Nanostrukturen
(Project Heads
Ganichev, Sergey
;
Molenkamp, Laurens W.
;
Wegscheider, Werner
)
-
C03 - Verdünnte Ferromagnete und Andreev-Reflektion in Supraleiter/Ferromagnet-Heterostrukturen
(Project Heads
Bayreuther, Günther
;
Ebert, Hubert
;
Strunk, Christoph
)
-
C04 - Spinabhängiger Transport heißer Elektronen
(Project Heads
Back, Christian
;
Bayreuther, Günther
;
Vancea, Johann
)
-
C05 - Transport properties of GaMnAs nanostructures and Fe/GaAs junctions
(Project Heads
Fabian, Jaroslav
;
Grifoni, Milena
)
-
C06 - Transport, Dynamics and Interaction Effects in Systems with Spin-Orbit Coupling
(Project Heads
Richter, Klaus
;
Schliemann, John
)
-
C07 - Electronic and Transport Properties of Two-Dimensional Magnetic and Spin-Polarized Heterostructures
(Project Heads
Fabian, Jaroslav
;
Schliemann, John
)
-
C08 - Spin Hall Effect in Metallic Heterostructures
(Project Heads
Back, Christian
;
Ebert, Hubert
;
Woltersdorf, Georg
)
-
C09 - Spin injection into silicon
(Project Heads
Bougeard, Dominique
;
Ciorga, Mariusz
;
Zweck, Josef
)
-
C11 - Ultrafast electric injection of spin-polarized tunnel currents in semiconductors
(Project Heads
Back, Christian
;
Bougeard, Dominique
;
Huber, Rupert
)
-
Z - Central Tasks
(Project Head
Weiss, Dieter
)
