Non-adiabatic two-parameter charge and spin pumping in a quantum dot (2008)
Braun, Matthias, Burkard, Guido
We study DC charge and spin transport through a weakly coupled quantum dot, driven by a non-adiabatic periodic change of system parameters. We generalize the model of Tien and Gordon to...
Signature of chirality in scanning-probe imaging of charge flow in graphene (2008)
Braun, Matthias, Chirolli, Luca, Burkard, Guido
We theoretically propose to directly observe the chiral nature of charge carriers in graphene mono- and bilayers within a controlled scattering experiment. The charge located on a capacitively...
Nonadiabatic Two-Parameter Charge and Spin Pumping in a Quantum Dot (2008)
Braun, Matthias, Burkard, Guido
We study dc charge and spin transport through a weakly coupled quantum dot, driven by a nonadiabatic periodic change of system parameters. We generalize the model of Tien and Gordon to simultaneously...
Non-adiabatic two-parameter charge and spin pumping in a quantum dot (2008)
Braun, Matthias, Burkard, Guido
We study DC charge and spin transport through a weakly coupled quantum dot, driven by a non-adiabatic periodic change of system parameters. We generalize the model of Tien and Gordon to...
Motion-Compensating Real-Time Format Converter for Video on Multimedia Displays (2007)
Matthias Braun, Martin Hahn, Jens-rainer Ohm, Maati Talmi
This paper introduces a high-quality, low-cost video converter, for the conversion of interlaced TV signals into progressive display formats of the same or higher frame repetition rate. This...
Waske, Björn, Heinzel, Vanessa, Braun, Matthias, Menz, Gunter
Zum Vol. I von: Computer science meets automation: 52. IWK, Internationales Wissenschaftliches Kolloquium ; proceedings ; 10 - 13 September 2007 Zum Vol. II von: Computer science meets automation:...
Signature of chirality in scanning-probe imaging of charge flow in graphene (2007)
Braun, Matthias, Chirolli, Luca, Burkard, Guido
We theoretically propose to directly observe the chiral nature of charge carriers in graphene mono- and bilayers within a controlled scattering experiment. The charge located on a capacitively...
Theory of a Magnetically-Controlled Quantum-Dot Spin Transistor (2007)
Urban, Daniel, Braun, Matthias, König, Jürgen
We examine transport through a quantum dot coupled to three ferromagnetic leads in the regime of weak tunnel coupling. A finite source-drain voltage generates a nonequilibrium spin on the otherwise...
R-type Ca2+-channel-evoked CICR regulates glucose-induced somatostatin secretion (2007)
Quan Zhang, Martin Bengtsson, Chris Partridge, Albert Salehi, Matthias Braun, Roger Cox, ...
R-type Ca(2+)-channel-evoked CICR regulates glucose-induced somatostatin secretion. (2007)
Zhang, Quan, Bengtsson, Martin, Partridge, Chris, Salehi, Albert, Braun, Matthias, Cox, Roger, ...
Abstract is not available
Transport durch ein Quantenpunkt-Spinventil (2006)
Zentrales Thema dieser Arbeit ist die theoretische Untersuchung von Spintransport durch Nanostrukturen, in denen es zu starker Elektron-Elektron-Wechselwirkung kommt. Als Modellsystem betrachten wir...
Faraday-rotation fluctuation spectroscopy with static and oscillating magnetic fields (2006)
Braun, Matthias, König, Jürgen
By Faraday-rotation fluctuation spectroscopy one measures the spin noise via Faraday-induced fluctuations of the polarization plane of a laser transmitting the sample. In the fist part of this paper,...
Frequency-Dependent Current Noise through Quantum-Dot Spin Valves (2006)
Braun, Matthias, König, Jürgen, Martinek, Jan
We study frequency-dependent current noise through a single-level quantum dot connected to ferromagnetic leads with non-collinear magnetization. We propose to use the frequency-dependent Fano factor...
Manipulating Single Spins in Quantum Dots Coupled to Ferromagnetic Leads (2005)
Braun, Matthias, König, Jürgen, Martinek, Jan
We discuss the possibility to generate, manipulate, and probe single spins in single-level quantum dots coupled to ferromagnetic leads. The spin-polarized currents flowing between dot and leads lead...
Probing level renormalization by sequential transport through double quantum dots (2005)
Wunsch, Bernhard, Braun, Matthias, König, Jürgen, Pfannkuche, Daniela
We study electron transport through double quantum dots in series. The tunnel coupling of the discrete dot levels to external leads causes a shift of their energy. This energy renormalization affects...
Spin current through a tunnel junction (2004)
Braun, Matthias, König, Jürgen, Martinek, Jan
We derive an expression for the spin-current through a tunnel barrier in terms of many-body Green's functions. The spin current has two contributions. One can be associated with angular-momentum...
Hanle Effect in Transport through Quantum Dots Coupled to Ferromagnetic Leads (2004)
Braun, Matthias, König, Jürgen, Martinek, Jan
We suggest a series of transport experiments on spin precession in quantum dots coupled to one or two ferromagnetic leads. Dot spin states are created by spin injection and analyzed via the linear...
Theory of Transport through Quantum-Dot Spin Valves in the Weak-Coupling Regime (2004)
Braun, Matthias, König, Jürgen, Martinek, Jan
We develop a theory of electron transport through quantum dots that are weakly coupled to ferromagnetic leads. The theory covers both the linear and nonlinear transport regime, takes non-collinear...
Braun, Matthias, Wendt, Anna, Birnir, Bryndis, Broman, Jonas, Eliasson, Lena, Galvanovskis, Juris, ...
Abstract is not available
Wendt, Anna, Birnir, Bryndis, Buschard, Karsten, Gromada, Jesper, Salehi, Albert, Sewing, Sabine, ...
Abstract is not available
Braun, Matthias, Wendt, Anna, Buschard, Karsten, Salehi, Albert, Sewing, Sabine, Gromada, Jesper, ...
Abstract is not available
Satellite image map of King George Island, Antarctica (2003)
Braun, Matthias, Simões, Jefferson C, Vogt, Steffen, Bremer, Ulisses F, Blindow, Norbert, Pfender, Marion, ...
A new topographic database for King George Island, one of the most visited areas in Antarctica, is presented. Data from differential GPS surveys, gained during the summers 1997/98 and 1999/2000, were...
Current induced modification of the ferromagnetic magnon dispersion relation / (2002)
Thesis (M.A.)--University of Texas at Austin, 2002.
On the background of various indications for on-going climatic and glacial changes on the Antarctic Peninsula, ablation on the King George Island ice cap was investigated during several summer...
On the background of various indications for on-going climatic and glacial changes on the Antarctic Peninsula, ablation on the King George Island ice cap was investigated during several summer...
Barg, Sebastian, Renström, Erik, Berggren, Per-Olof, Bertorello, Alejandro, Bokvist, Krister, Braun, Matthias, ...
Intracellular application of the sulfonylurea tolbutamide during whole-cell patch-clamp recordings stimulated exocytosis >5-fold when applied at a cytoplasmic Ca2+ concentration of 0.17 microM....
Düsseldorf, Univ., Diss., 1996.
Mikroreprod. eines Ms. Getr. Zählung : graph. Darst.
Berlin, Akad. d. Wiss. d. DDR, Diss. A, 1990 (Nicht f.d. Austausch).
Würzburg, Univ., Diss. : 1986.
Berlin, Akad. für Ärztl. Fortbildung d. DDR, Diss., 1983 (Nicht f.d. Austausch).
Barg, Sebastian, Renström, Erik, Berggren, Per-Olof, Bertorello, Alejandro, Bokvist, Krister, Braun, Matthias, ...
Intracellular application of the sulfonylurea tolbutamide during whole-cell patch-clamp recordings stimulated exocytosis >5-fold when applied at a cytoplasmic Ca2+ concentration of 0.17 μM. This...
Braun, Matthias, Wendt, Anna, Buschard, Karsten, Salehi, Albert, Sewing, Sabine, Gromada, Jesper, ...
We have investigated the regulation of hormone secretion from rat pancreatic islets by the GABAB receptors (GABABRs). Inclusion of the specific GABABR antagonist CGP 55845 in the extracellular medium...
Barg, Sebastian, Renström, Erik, Berggren, Per-Olof, Bertorello, Alejandro, Bokvist, Krister, Braun, Matthias, ...
Intracellular application of the sulfonylurea tolbutamide during whole-cell patch-clamp recordings stimulated exocytosis >5-fold when applied at a cytoplasmic Ca2+ concentration of 0.17 μM. This...
Braun, Matthias, Wendt, Anna, Buschard, Karsten, Salehi, Albert, Sewing, Sabine, Gromada, Jesper, ...
We have investigated the regulation of hormone secretion from rat pancreatic islets by the GABAB receptors (GABABRs). Inclusion of the specific GABABR antagonist CGP 55845 in the extracellular medium...
Lissat, Andrej, Vraetz, Thomas, Tsokos, Maria, Klein, Ruth, Braun, Matthias, Koutelia, Nino, ...
Ewing’s sarcoma cells are highly susceptible to apoptosis via tumor necrosis factor apoptosis-inducing ligand (TRAIL). Resistance to TRAIL has been linked to deficient expression of caspase-8 in...
Braun, Matthias, Wendt, Anna, Karanauskaite, Jovita, Galvanovskis, Juris, Clark, Anne, MacDonald, Patrick E., ...
The release of γ-aminobutyric acid (GABA) and ATP from rat β cells was monitored using an electrophysiological assay based on overexpression GABAA or P2X2 receptor ion channels. Exocytosis of...
Regulated Exocytosis of GABA-containing Synaptic-like Microvesicles in Pancreatic β-cells
Braun, Matthias, Wendt, Anna, Birnir, Bryndis, Broman, Jonas, Eliasson, Lena, Galvanovskis, Juris, ...
We have explored whether γ-aminobutyric acid (GABA) is released by regulated exocytosis of GABA-containing synaptic-like microvesicles (SLMVs) in insulin-releasing rat pancreatic β-cells. To this...
miR-375 maintains normal pancreatic α- and β-cell mass
Poy, Matthew N., Hausser, Jean, Trajkovski, Mirko, Braun, Matthias, Collins, Stephan, Rorsman, Patrik, ...
Altered growth and development of the endocrine pancreas is a frequent cause of the hyperglycemia associated with diabetes. Here we show that microRNA-375 (miR-375), which is highly expressed in...
Novel aspects of the molecular mechanisms controlling insulin secretion
Eliasson, Lena, Abdulkader, Fernando, Braun, Matthias, Galvanovskis, Juris, Hoppa, Michael B, Rorsman, Patrik
Pancreatic β-cells secrete insulin by Ca2+-dependent exocytosis of secretory granules. β-cell exocytosis involves SNARE (soluble NSF-attachment protein receptor) proteins similar to those...