Zobrazeno 1 - 10
of 472
pro vyhledávání: '"Nussbaumer, T"'
Publikováno v:
Proc. XXXIXth Rencontres de Moriond on Quantum Information and Decoherence in Nanosystems, 363 (2004)
We report on electrical transport measurements through a carbon nanotube quantum dot coupled to a normal and a superconducting lead. The ratio of Kondo temperature and superconducting gap $T_{K}/\Delta$ is identified to govern the transport propertie
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406638
Publikováno v:
Nanotechnology 15, 479 (2004)
We report on electrical transport measurements in a carbon nanotube quantum dot coupled to a normal and a superconducting lead. Depending on the ratio of Kondo temperature $T_{K}$ and superconducting gap $\Delta$ the zero bias conductance resonance e
Externí odkaz:
http://arxiv.org/abs/cond-mat/0403431
Publikováno v:
Phys. Ref. Lett. 91, 057005 (2003)
We report resonant multiple Andreev relections in a multiwall carbon nanotube quantum dot coupled to superconducting leads. The position and magnitude of the subharmonic gap structure is found to depend strongly on the level positions of the single-e
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304233
The Kondo effect and superconductivity are both prime examples of many-body phenomena. Here we report transport measurements on a carbon nanotube quantum dot coupled to superconducting leads that show a delicate interplay between both effects. We dem
Externí odkaz:
http://arxiv.org/abs/cond-mat/0209048
We report high-resolution measurements of voltage (V) noise in the mixed state of micrometre-sized thin films of amorphous Nb0.7Ge0.3, which is a good representative of weak-pinning superconductors. There is a remarkable difference between the noise
Externí odkaz:
http://arxiv.org/abs/cond-mat/0111456
We have measured the differential conductance dI/dV of individual multi-wall carbon nanotubes (MWNT) of different lengths. A cross-over from wire-like (long tubes) to dot-like (short tubes) behavior is observed. dI/dV is dominated by random conductan
Externí odkaz:
http://arxiv.org/abs/cond-mat/0110074
We study the influence of a DC bias voltage V on quantum interference corrections to the measured differential conductance in metallic mesoscopic wires and rings. The amplitude of both universal conductance fluctuations (UCF) and Aharonov-Bohm effect
Externí odkaz:
http://arxiv.org/abs/cond-mat/0103486
We explore the electric-field effect of carbon nanotubes (NTs) in electrolytes. Due to the large gate capacitance, Fermi energy shifts of order +/- 1 V can be induced, enabling to tune NTs from p to n-type. Consequently, large resistance changes are
Externí odkaz:
http://arxiv.org/abs/cond-mat/0009171
We report measurements of the amplitude of the Aharonov-Bohm oscillations in a mesoscopic diffusive gold ring as a function of the DC bias voltage V. The amplitude of the h/e oscillations increases with V once the Thouless energy Ec and thermal energ
Externí odkaz:
http://arxiv.org/abs/cond-mat/0002326
Publikováno v:
Physical Review B, Vol. 62, p. 4079 (2000)
We have studied superconductor/normal metal/superconductor (SNS) junctions consisting of short Au or Cu wires between Nb or Al banks. The Nb based junctions display inherent electron heating effects induced by the high thermal resistance of the NS bo
Externí odkaz:
http://arxiv.org/abs/cond-mat/9901129