Zobrazeno 1 - 10
of 302
pro vyhledávání: '"Weinmann, D."'
Autor:
Steinacher, R., Pöltl, C., Krähenmann, T., Hofmann, A., Reichl, C., Zwerger, W., Wegscheider, W., Jalabert, R. A., Ensslin, K., Weinmann, D., Ihn, T.
Publikováno v:
Phys. Rev. B 98, 075426 (2018)
An open resonator fabricated in a two-dimensional electron gas is used to explore the transition from strongly invasive scanning gate microscopy to the perturbative regime of weak tip-induced potentials. With the help of numerical simulations that fa
Externí odkaz:
http://arxiv.org/abs/1709.08559
Publikováno v:
Phys. Rev. B 94, 195428 (2016)
Numerous experimental and theoretical studies have focused on low-dimensional systems locally perturbed by the biased tip of a scanning force microscope. In all cases either open or closed weakly gate-tunable nanostructures have been investigated, su
Externí odkaz:
http://arxiv.org/abs/1611.06274
Autor:
Kozikov, A. A., Weinmann, D., Roessler, C., Ihn, T., Ensslin, K., Reichl, C., Wegscheider, W.
Publikováno v:
New J. Phys. 15, 083005 (2013)
We perform scanning gate experiments on ballistic constrictions in the presence of small perpendicular magnetic fields. The constrictions form the entrance and exit of a circular gate-defined ballistic stadium. Close to constrictions we observe sets
Externí odkaz:
http://arxiv.org/abs/1305.0354
Publikováno v:
Phys. Rev. B 88, 035406 (2013)
A systematic theory of the conductance measurements of non-invasive (weak probe) scanning gate microscopy is presented that provides an interpretation of what precisely is being measured. A scattering approach is used to derive explicit expressions f
Externí odkaz:
http://arxiv.org/abs/1302.1151
Publikováno v:
Euro. Phys. J. D 44, 351 (2007)
We show that the dynamics of the surface plasmon in metallic nanoparticles damped by its interaction with particle-hole excitations can be modelled by a single degree of freedom coupled to an environment. In this approach, the fast decrease of the di
Externí odkaz:
http://arxiv.org/abs/cond-mat/0703720
Publikováno v:
Physical Review B 69, 073302 (2004)
We present measurements on nuclear spin relaxation probed by a single quantum dot in a high-mobility electron gas. Current passing through the dot leads to a spin transfer from the electronic to the nuclear spin system. Applying electron spin resonan
Externí odkaz:
http://arxiv.org/abs/cond-mat/0308243
Autor:
Huettel, A. K., Qin, H., Holleitner, A. W., Blick, R. H., Neumaier, K., Weinmann, D., Eberl, K., Kotthaus, J. P.
Publikováno v:
Europhys. Lett. 62, 712 (2003)
We present measurements on spin blockade in a laterally integrated quantum dot. The dot is tuned into the regime of strong Coulomb blockade, confining ~ 50 electrons. At certain electronic states we find an additional mechanism suppressing electron t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0109104
Publikováno v:
Phys. Rev. Lett. 75 1995 1598
The full spectrum of two interacting electrons in a disordered mesoscopic one--dimensional ring threaded by a magnetic flux is calculated numerically. For ring sizes far exceeding the one--particle localization length $L_1$ we find several $h/2e$--pe
Externí odkaz:
http://arxiv.org/abs/cond-mat/9503120
The pair localization length $L_2$ of two interacting electrons in one--dimensional disordered systems is studied numerically. Using two direct approaches, we find $L_2 \propto L_1^{\alpha}$, where $L_1$ is the one-electron localization length and $\
Externí odkaz:
http://arxiv.org/abs/cond-mat/9503052
The influence of excited levels on nonlinear transport properties of a quantum dot weakly coupled to leads is studied using a master--equation approach. A charging model for the dot is compared with a quantum mechanical model for interacting electron
Externí odkaz:
http://arxiv.org/abs/cond-mat/9306050