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Physics Colloquium


27.11.2017 5:15 p.m., room: T-1004
Dr. Helmut Schultheiss (Helmholtz-Zentrum Dresden-Rossendorf)
Magnon Transport in Spin Textures
11.12.2017 5:15 p.m., room: T-1004
Professor Rolf Haug (Universität Hannover)
Shot Noise in Single-Electron Tunneling through Quantum Dots: A Toolbox to Study Quantum Physics

Shot Noise in Single-Electron Tunneling through Quantum Dots: A Toolbox to Study Quantum Physics

Rolf J. Haug, Leibniz Universität Hannover, Germany

Shot noise in electronic transport originates from the discrete nature of the electric charge. It was first introduced in 1918 by Walter Schottky who studied fluctuations of current in vacuum tubes. Later on it was understood that the magnitude of shot noise depends on correlations among the electrons. Therefore, shot noise measurements are a tool to come to an understanding of correlations in a system. In studying shot noise in transport through quantum dots, i.e. quasi zero-dimensional systems in semiconductors where only single electrons are allowed to tunnel, one has access to quantum mechanical correlations in these systems in a variety of ways. In the talk studies of shot noise in single-electron tunneling through quantum dots will be reviewed [1,2] and it will be shown how one can influence the measured noise [3].

[1] N. Ubbelohde, C. Fricke, C. Flindt, F. Hohls, R.J. Haug; Nature Comm. 3, 612 (2012) [2] N. Ubbelohde, F. Hohls, V. Kashcheyevs, T. Wagner, L. Fricke, B. Kästner, K. Pierz, H.W. Schumacher, R.J. Haug; Nature Nanotech. 10, 46 (2015) [3] T. Wagner, P. Strasberg, J.C. Bayer, E.P. Rugeramigabo, T. Brandes, R.J. Haug; Nature Nanotech. 12, 218 (2017)

8.1.2018 5:15 p.m., room: T-1004
Ursula Wurstbauer (Walter Schottky Institut, TU München)
Exzitonen, Phononen und Elektronen in van der Waals Heterostrukturen
22.1.2018 5:15 p.m., room: T-1004
Prof. Dr. Paulo A. Maia Neto (Universidade Federal do Rio de Janeiro)
Recent advances in Casimir physics