Zobrazeno 1 - 10
of 152
pro vyhledávání: '"Weinmann, Dietmar"'
Autor:
Leumer, Nico G., Basko, Denis M., Jalabert, Rodolfo A., Weinmann, Dietmar, Whitney, Robert S.
Spatially-resolved heating and cooling in nanostructures is nowadays measured with various nanoscale thermometry techniques, including scanning thermometry. Yet the most commonly used theory of nanoscale heating and thermoelectricity -- Landauer scat
Externí odkaz:
http://arxiv.org/abs/2407.10192
Autor:
Percebois, Gaëtan J., Lacerda-Santos, Antonio, Brun, Boris, Hackens, Benoit, Waintal, Xavier, Weinmann, Dietmar
Publikováno v:
SciPost Phys. 15, 242 (2023)
The weak disorder potential seen by the electrons of a two-dimensional electron gas in high-mobility semiconductor heterostructures leads to fluctuations in the physical properties and can be an issue for nanodevices. In this paper, we show that a sc
Externí odkaz:
http://arxiv.org/abs/2308.13372
Publikováno v:
Phys. Rev. B 107, 085420 (2023)
The conductance of graphene nanoribbons and nanoconstrictions under the effect of a scanning gate microscopy tip is systematically studied. Using a scattering approach for noninvasive probes, the first- and second-order conductance corrections caused
Externí odkaz:
http://arxiv.org/abs/2211.14004
Autor:
Blaas-Anselmi, Carmen, Helluin, Félix, Jalabert, Rodolfo A., Weick, Guillaume, Weinmann, Dietmar
Publikováno v:
SciPost Phys. 12, 105 (2022)
We investigate the power dissipated by an electronic current flowing through a quantum point contact in a two-dimensional electron gas. Based on the Landauer-B\"uttiker approach to quantum transport, we evaluate the power that is dissipated on the tw
Externí odkaz:
http://arxiv.org/abs/2112.04890
Publikováno v:
Phys. Rev. B 105, 085405 (2022)
Ensembles of gold nanoparticles present a magnetic behavior which is at odds with the weakly diamagnetic response of bulk gold. In particular, an unusual ferromagnetic order has been unveiled by several experiments. Here we investigate if the combine
Externí odkaz:
http://arxiv.org/abs/2107.04508
Publikováno v:
Phys. Rev. B 104, 075422 (2021)
We present a machine learning approach that allows to characterize the disorder potential of a two-dimensional electronic system from its quantum transport properties. Numerically simulated transport data for a large number of disorder configurations
Externí odkaz:
http://arxiv.org/abs/2106.11623
Publikováno v:
Phys. Rev. B 104, 245428 (2021)
While the large paramagnetic response measured in certain ensembles of metallic nanoparticles has been assigned to orbital effects of conduction electrons, the spin-orbit coupling has been pointed out as a possible origin of the anomalously large dia
Externí odkaz:
http://arxiv.org/abs/2106.10113
Autor:
Gold, Carolin, Bräm, Beat A., Ferguson, Michael S., Krähenmann, Tobias, Hofmann, Andrea, Steinacher, Richard, Fratus, Keith R., Reichl, Christian, Wegscheider, Werner, Weinmann, Dietmar, Ensslin, Klaus, Ihn, Thomas
Publikováno v:
Phys. Rev. Research 3, 032005 (2021)
We use Scanning Gate Microscopy to study electron transport through an open, gate-defined resonator in a Ga(Al)As heterostructure. Raster-scanning the voltage-biased metallic tip above the resonator, we observe distinct conductance modulations as a f
Externí odkaz:
http://arxiv.org/abs/2011.13869
Autor:
Fratus, Keith R., Calonnec, Camille Le, Jalabert, Rodolfo A., Weick, Guillaume, Weinmann, Dietmar
Publikováno v:
SciPost Phys. 10, 069 (2021)
We demonstrate the emergence of classical features in electronic quantum transport for the scanning gate microscopy response in a cavity defined by a quantum point contact and a micron-sized circular reflector. The branches in electronic flow charact
Externí odkaz:
http://arxiv.org/abs/2010.12409
Publikováno v:
Phys. Rev. B 100, 155435 (2019)
The branched pattern typically observed through the scanning gate microscopy (SGM) of two dimensional electron gases in the presence of weak, smooth disorder has recently been found to be robust against a very large shift in the Fermi energy of the e
Externí odkaz:
http://arxiv.org/abs/1904.07777