Zobrazeno 1 - 10
of 154
pro vyhledávání: '"Csonka, S."'
Publikováno v:
Nanoscale 8, 11480 (2016)
We report on the observation of periodic conductance oscillations near quantum Hall plateaus in suspended graphene nanoribbons. They are attributed to single quantum dots that form in the narrowest part of the ribbon, in the valleys and hills of a di
Externí odkaz:
http://arxiv.org/abs/1601.01628
Autor:
Fülöp, G., d'Hollosy, S., Hofstetter, L., Baumgartner, A., Nygård, J., Schönenberger, C., Csonka, S.
Advanced synthesis of semiconductor nanowires (NWs) enables their application in diverse fields, notably in chemical and electrical sensing, photovoltaics, or quantum electronic devices. In particular, Indium Arsenide (InAs) NWs are an ideal platform
Externí odkaz:
http://arxiv.org/abs/1601.01562
Autor:
Fülöp, G., Domínguez, F., d'Hollosy, S., Baumgartner, A., Makk, P., Madsen, M. H., Guzenko, V. A., Nygård, J., Schönenberger, C., Yeyati, A. Levy, Csonka, S.
Publikováno v:
Phys. Rev. Lett. 115, 227003 (2015)
Cooper pair splitting (CPS) is a process in which the electrons of naturally occurring spin-singlet pairs in a superconductor are spatially separated using two quantum dots. Here we investigate the evolution of the conductance correlations in an InAs
Externí odkaz:
http://arxiv.org/abs/1507.01036
Autor:
Fülöp, G., d'Hollosy, S., Baumgartner, A., Makk, P., Guzenko, V. A., Madsen, M. H., Nygård, J., Schönenberger, C., Csonka, S.
Publikováno v:
Phys. Rev. B 90, 235412 (2014)
A Cooper pair splitter consists of a central superconducting contact, S, from which electrons are injected into two parallel, spatially separated quantum dots (QDs). This geometry and electron interactions can lead to correlated electrical currents d
Externí odkaz:
http://arxiv.org/abs/1409.0818
Publikováno v:
Phys. Rev. B 85, 174512 (2012)
We study the interplay of superconducting and ferromagnetic correlations on charge transport in different geometries with a focus on both a quantum point contact as well as a quantum dot in the even and the odd state with and without spin-active scat
Externí odkaz:
http://arxiv.org/abs/1204.6581
Autor:
Hofstetter, L., Csonka, S., Baumgartner, A., Fülöp, d'Hollosy, S., Nygård, J., Schönenberger, C.
Publikováno v:
Phys. Rev. Lett. 107, 136801 (2011)
In a device with a superconductor coupled to two parallel quantum dots (QDs) the electrical tunability of the QD levels can be used to exploit non-classical current correlations due to the splitting of Cooper pairs. We experimentally investigate the
Externí odkaz:
http://arxiv.org/abs/1105.2583
Publikováno v:
Phys. Rev. Lett. 104, 246804 (2010)
Ferromagnetic proximity effect is studied in InAs nanowire (NW) based quantum dots (QD) strongly coupled to a ferromagnetic (F) and a superconducting (S) lead. The influence of the F lead is detected through the splitting of the spin-1/2 Kondo resona
Externí odkaz:
http://arxiv.org/abs/0910.3237
Publikováno v:
Phys. Rev. B 79, 245324 (2009)
We use an electronic Mach-Zehnder interferometer to explore the non-equilibrium coherence of the electron waves within the edge-states that form in the integral quantum Hall effect. The visibility of the interference as a function of bias-voltage and
Externí odkaz:
http://arxiv.org/abs/0812.2612
Akademický článek
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Autor:
Csonka, S., Hofstetter, L., Freitag, F., Oberholzer, S., Jespersen, T. S., Aagesen, M., Nygard, J., Schonenberger, C.
We study the g-factor of discrete electron states in InAs nanowire based quantum dots. The g values are determined from the magnetic field splitting of the zero bias anomaly due to the spin 1/2-Kondo effect. Unlike to previous studies based on 2DEG q
Externí odkaz:
http://arxiv.org/abs/0808.1492