2D superconductivity with strong spin-orbit interaction

We consider superconductivity confined at a two-dimensional interface with a strong surface spin-orbit (Rashba) interaction. Some peculiar properties of this system are investigated. In particular, we show that an in-plane Zeeman field can induce a supercurrent flow.Comment: latex, 1 figure in ep

Measuring current by counting electrons in a nanowire quantum dot

We measure current by counting single electrons tunneling through an InAs nanowire quantum dot. The charge detector is realized by fabricating a quantum point contact in close vicinity to the nanowire. The results based on electron counting compare well to a direct measurements of the quantum dot current, when taking the finite bandwidth of the detector into account. The ability to detect single electrons also opens up possibilities for manipulating and detecting individual spins in nanowire quantum dots

Properties of the energy landscape of network models for covalent glasses

We investigate the energy landscape of two dimensional network models for covalent glasses by means of the lid algorithm. For three different particle densities and for a range of network sizes, we exhaustively analyse many configuration space regions enclosing deep-lying energy minima. We extract the local densities of states and of minima, and the number of states and minima accessible below a certain energy barrier, the 'lid'. These quantities show on average a close to exponential growth as a function of their respective arguments. We calculate the configurational entropy for these pockets of states and find that the excess specific heat exhibits a peak at a critical temperature associated with the exponential growth in the local density of states, a feature of the specific heat also observed in real glasses at the glass transition.Comment: RevTeX, 19 pages, 7 figure

Detecting THz current fluctuations in a quantum point contact using a nanowire quantum dot

We use a nanowire quantum dot to probe high-frequency current fluctuations in a nearby quantum point contact. The fluctuations drive charge transitions in the quantum dot, which are measured in real-time with single-electron detection techniques. The quantum point contact (GaAs) and the quantum dot (InAs) are fabricated in different material systems, which indicates that the interactions are mediated by photons rather than phonons. The large energy scales of the nanowire quantum dot allow radiation detection in the long-wavelength infrared regime

Zeig doch mal! - Tipps für die Erstellung von Lernvideos in Lege- und Zeichentechnik

In populären Erklär- und Lernvideos kommen immer wieder Zeichen- und Legetechniken zum Einsatz, bei der Bilder live gezeichnet oder Papierfiguren hineingelegt und verschoben werden, um Lerninhalte zu verdeutlichen. Populär geworden ist diese Methode durch die Videoreihe von Common Craft "in Plain English", bei der die Funktionalität unterschiedlicher sozialer Anwendungen erklärt wird. Die Autorin und der Autor schreiben in Form eines Werkstattberichtes von ihren Erfahrungen bei der Erstellung und dem Einsatz von Lernvideos in der Legetechnik und geben Empfehlungen für Nachahmer/innen. 24.04.2014 | Sandra Schön (Salzburg) & Martin Ebner (Graz