Takis Kontos

Multi-terminal spin-dependent transport in ballistic carbon nanotubes (2009)

Cottet, Audrey, Feuillet-Palma, Chéryl, Kontos, Takis

We study theoretically nonlocal spin transport in a ballistic carbon nanotube contacted to two ferromagnetic leads and two normal-metal leads. When the magnetizations of the two ferromagnets are...

Subnanosecond single electron source in the time-domain (2008)

Mahé, Adrien, Parmentier, François, Fève, Gwendal, Berroir, Jean-Marc, Kontos, Takis, Cavanna, A., ...

We describe here the realization of a single electron source similar to single photon sources in optics. On-demand single electron injection is obtained using a quantum dot connected to the conductor...

Single Carbon Nanotube Transistor at GHz Frequency (2008)

Chaste, Julien, Lechner, Lorenz, Morfin, Pascal, Feve, Gwendal, Kontos, Takis, Berroir, Jean-Marc, ...

We report on microwave operation of top-gated single carbon nanotube transistors. From transmission measurements in the 0.1-1.6 GHz range, we deduce device transconductance gm and gate-nanotube...

Single Carbon Nanotube Transistor at GHz Frequency (2008)

Chaste, Julien, Lechner, Lorentz, Morfin, Pascal, Fève, Gwendal, Kontos, Takis, Berroir, Jean-Marc, ...

We report on microwave operation of top-gated single carbon nanotube transistors. From transmission measurements in the 0.1-1.6 GHz range, we deduce device transconductance gm and gate-nanotube...

Single Carbon Nanotube Transistor at GHz Frequency (2008)

Chaste, Julien, Lechner, Lorentz, Morfin, Pascal, Fève, Gwendal, Kontos, Takis, Berroir, Jean-Marc, ...

We report on microwave operation of top-gated single carbon nanotube transistors. From transmission measurements in the 0.1-1.6 GHz range, we deduce device transconductance gm and gate-nanotube...

Subnanosecond single electron source in the time-domain (2008)

Mahé, Adrien, Parmentier, François, Fève, Gwendal, Berroir, Jean-Marc, Kontos, Takis, Cavanna, A., ...

We describe here the realization of a single electron source similar to single photon sources in optics. On-demand single electron injection is obtained using a quantum dot connected to the conductor...

Subnanosecond single electron source in the time-domain (2008)

Mahé, Adrien, Parmentier, François, Fève, Gwendal, Berroir, Jean-Marc, Kontos, Takis, Cavanna, A., ...

We describe here the realization of a single electron source similar to single photon sources in optics. On-demand single electron injection is obtained using a quantum dot connected to the conductor...

An On-Demand Coherent Single Electron Source (2007)

Fève, Gwendal, Mahé, Adrien, Berroir, Jean-Marc, Kontos, Takis, Plaçais, Bernard, Glattli, Christian, ...

We report on the electron analog of the single photon gun. On demand single electron injection in a quantum conductor was obtained using a quantum dot connected to the conductor via a tunnel barrier....

The relaxation time of a chiral quantum R-L circuit (2007)

Gabelli, Julien, Fève, Gwendal, Kontos, Takis, Berroir, Jean-Marc, Plaçais, Bernard, Glattli, Christian, ...

We report on the GHz complex admittance of a chiral one dimensional ballistic conductor formed by edge states in the quantum Hall regime. The circuit consists of a wide Hall bar (the inductor L) in...

Nanospintronics with carbon nanotubes (2007)

Cottet, Audrey, Kontos, Takis, Sahoo, Sangeeta, Man, Hon Tin, Choi, Mahn-Soo, Belzig, Wolfgang, ...

One of the actual challenges of spintronics is the realization of a spin-transistor allowing to control spin transport through an electrostatic gate. In this review, we report on different...

The relaxation time of a chiral quantum R-L circuit (2007)

Gabelli, Julien, Fève, Gwendal, Kontos, Takis, Berroir, Jean-Marc, Plaçais, Bernard, Glattli, Christian, ...

We report on the GHz complex admittance of a chiral one dimensional ballistic conductor formed by edge states in the quantum Hall regime. The circuit consists of a wide Hall bar (the inductor L) in...

The relaxation time of a chiral quantum R-L circuit (2007)

Gabelli, Julien, Fève, Gwendal, Kontos, Takis, Berroir, Jean-Marc, Plaçais, Bernard, Glattli, Christian, ...

We report on the GHz complex admittance of a chiral one dimensional ballistic conductor formed by edge states in the quantum Hall regime. The circuit consists of a wide Hall bar (the inductor L) in...

An On-Demand Coherent Single Electron Source (2007)

Fève, Gwendal, Mahé, Adrien, Berroir, Jean-Marc, Kontos, Takis, Plaçais, Bernard, Glattli, Christian, ...

We report on the electron analog of the single photon gun. On demand single electron injection in a quantum conductor was obtained using a quantum dot connected to the conductor via a tunnel barrier....

The relaxation time of a chiral quantum R-L circuit (2007)

Gabelli, Julien, Fève, Gwendal, Kontos, Takis, Berroir, Jean-Marc, Plaçais, Bernard, Glattli, Christian, ...

We report on the GHz complex admittance of a chiral one dimensional ballistic conductor formed by edge states in the quantum Hall regime. The circuit consists of a wide Hall bar (the inductor L) in...

An On-Demand Coherent Single Electron Source (2007)

Fève, Gwendal, Mahé, Adrien, Berroir, Jean-Marc, Kontos, Takis, Plaçais, Bernard, Glattli, Christian, ...

We report on the electron analog of the single photon gun. On demand single electron injection in a quantum conductor was obtained using a quantum dot connected to the conductor via a tunnel barrier....

Controlling spin in a ballistic electron interferometer with spin active interfaces (2006)

Cottet, Audrey, Kontos, Takis, Belzig, Wolfgang, Schönenberger, Christian, Bruder, Christoph

We consider electronic current transport through a ballistic one-dimensional quantum wire connected to two ferromagnetic leads. We study the effects of the spin-dependence of interfacial phase shifts...

Controlling spin in a ballistic electron interferometer with spin active interfaces (2006)

Cottet, Audrey, Kontos, Takis, Belzig, Wolfgang, Schönenberger, Christian, Bruder, Christoph

We consider electronic current transport through a ballistic one-dimensional quantum wire connected to two ferromagnetic leads. We study the effects of the spin-dependence of interfacial phase shifts...

Controlling spin in a ballistic electron interferometer with spin active interfaces (2006)

Cottet, Audrey, Kontos, Takis, Belzig, Wolfgang, Schönenberger, Christian, Bruder, Christoph

We consider electronic current transport through a ballistic one-dimensional quantum wire connected to two ferromagnetic leads. We study the effects of the spin-dependence of interfacial phase shifts...

Controlling spin in an electronic interferometer with spin-active interfaces (2006)

Cottet, Audrey, Kontos, Takis, Belzig, Wolfgang, Schönenberger, Christian, Bruder, Christoph

We consider electronic current transport through a ballistic one-dimensional quantum wire connected to two ferromagnetic leads. We study the effects of the spin-dependence of interfacial phase shifts...

Electric Field Control of Spin Transport (2005)

Sahoo, Sangeeta, Kontos, Takis, Furer, Jürg, Hoffmann, Christian, Gräber, Matthias, Cottet, Audrey, ...

Spintronics is an approach to electronics in which the spin of the electrons is exploited to control the electric resistance R of devices. One basic building block is the spin-valve, which is formed...

Shot-noise and conductance measurements of transparent superconductor/two-dimensional electron gas junctions (2005)

Choi, Bong-Ryoul, Hansen, A. E., Kontos, Takis, Hoffmann, M., Oberholzer, Stefan, Belzig, Wolfgang, ...

We have measured the conductance and shot noise of superconductor-normal metal (S-N) junctions between a niobium (Nb) film and a two-dimensional electron gas (2DEG), formed in an InAs-based...