Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Hennel, Szymon"'
Autor:
Röösli, Marc P., Brem, Lars, Kratochwil, Benedikt, Nicolí, Giorgio, Braem, Beat A., Hennel, Szymon, Märki, Peter, Berl, Matthias, Reichl, Christian, Rosenow, Bernd, Wegscheider, Werner, Ensslin, Klaus, Ihn, Thomas
Publikováno v:
Phys. Rev. B 101, 125302 (2020)
We measure the magneto-conductance through a micron-sized quantum dot hosting about 500 electrons in the quantum Hall regime. In the Coulomb blockade, when the island is weakly coupled to source and drain contacts, edge reconstruction at filling fact
Externí odkaz:
http://arxiv.org/abs/1910.12525
Autor:
Nicolí, Giorgio, Märki, Peter, Bräm, Beat A., Röösli, Marc P., Hennel, Szymon, Hofmann, Andrea, Reichl, Christian, Wegscheider, Werner, Ihn, Thomas, Ensslin, Klaus
Publikováno v:
Rev. Sci. Instr. 90, 113901 (2019)
Experiments performed at a temperature of a few millikelvin require effective thermalization schemes, low-pass filtering of the measurement lines and low-noise electronics. Here, we report on the modifications to a commercial dilution refrigerator wi
Externí odkaz:
http://arxiv.org/abs/1909.10906
Autor:
Braem, Beat A, Pellegrino, Francesco M D, Principi, Alessandro, Röösli, Marc, Gold, Carolin, Hennel, Szymon, Koski, Jonne V, Berl, Matthias, Dietsche, Werner, Wegscheider, Werner, Polini, Marco, Ihn, Thomas, Ensslin, Klaus
Publikováno v:
Phys. Rev. B 98, 241304 (2018)
We measure transport through a Ga[Al]As heterostructure at temperatures between 0.1 K and 30 K. Increasing the temperature enhances the electron-electron scattering rate and viscous effects in the two-dimensional electron gas arise. To probe this reg
Externí odkaz:
http://arxiv.org/abs/1807.03177
Autor:
Braem, Beat A., Krähenmann, Tobias, Hennel, Szymon, Reichl, Christian, Wegscheider, Werner, Ensslin, Klaus, Ihn, Thomas
Publikováno v:
Phys. Rev. B 93, 115442 (2016)
We use the voltage biased tip of a scanning force microscope at a temperature of 35\,mK to locally induce the fractional quantum Hall state of $\nu=1/3$ in a split-gate defined constriction. Different tip positions allow us to vary the potential land
Externí odkaz:
http://arxiv.org/abs/1603.03567
A four-terminal donor quantum dot (QD) is used to characterize potential barriers between degenerately doped nanoscale contacts. The QD is fabricated by hydrogen-resist lithography on Si(001) in combination with $n$-type doping by phosphine. The four
Externí odkaz:
http://arxiv.org/abs/1602.02817
Autor:
Hennel, Szymon, Braem, Beat A., Baer, Stephan, Tiemann, Lars, Sohi, Pirouz, Wehrli, Dominik, Hofmann, Andrea, Reichl, Christian, Wegscheider, Werner, Rössler, Clemens, Ihn, Thomas, Ensslin, Klaus, Rudner, Mark S., Rosenow, Bernd
Publikováno v:
Phys. Rev. Lett. 116, 136804 (2016)
In a quantum Hall ferromagnet, the spin polarization of the two-dimensional electron system can be dynamically transferred to nuclear spins in its vicinity through the hyperfine interaction. The resulting nuclear field typically acts back locally, mo
Externí odkaz:
http://arxiv.org/abs/1511.03593
Autor:
Nichele, Fabrizio, Hennel, Szymon, Pietsch, Patrick, Wegscheider, Werner, Stano, Peter, Jacquod, Philippe, Ihn, Thomas, Ensslin, Klaus
Publikováno v:
Phys. Rev. Lett. 114, 206601 (2015)
Storing, transmitting, and manipulating information using the electron spin resides at the heart of spintronics. Fundamental for future spintronics applications is the ability to control spin currents in solid state systems. Among the different platf
Externí odkaz:
http://arxiv.org/abs/1409.4045
Autor:
Nichele, Fabrizio, Chesi, Stefano, Hennel, Szymon, Wittmann, Angela, Gerl, Christian, Wegscheider, Werner, Loss, Daniel, Ihn, Thomas, Ensslin, Klaus
Publikováno v:
Phys. Rev. Lett 113,046801 (2014)
We present transport experiments performed in high quality quantum point contacts embedded in a GaAs two-dimensional hole gas. The strong spin-orbit interaction results in peculiar transport phenomena, including the previously observed anisotropic Ze
Externí odkaz:
http://arxiv.org/abs/1405.2981
Autor:
Nichele, Fabrizio, Komijani, Yashar, Hennel, Szymon, Ihn, Thomas, Ensslin, Klaus, Gerl, Christian, Wegscheider, Werner, Reuter, Dirk, Wieck, Andreas D.
Publikováno v:
F Nichele et al 2013 New J. Phys. 15 033029
We present low-temperature transport experiments on Aharonov-Bohm (AB) rings fabricated from two-dimensional hole gases in p-type GaAs/AlGaAs heterostructures. Highly visible h/e (up to 15%) and h/2e oscillations, present for different gate voltages,
Externí odkaz:
http://arxiv.org/abs/1305.1872
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