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Electronic transport in semiconductor nanostructures Thomas Ihn ETH Zürich FS 17 After this lecture you know and understand… • … how multi-terminal devices are described within Landauer-Büttiker theory • … the integer quantum Hall effect phenomenology • … the Landauer-Büttiker view on the integer quantum Hall effect Hall bar samples 1 mm Quantum Hall effect Quantized Hall resistance: h 1 r xy = 2 e n Shubnikov-de Haas effect Fowler, 1966 Shubnikov-de Haas effect GaAs heterostructure, Hall bar Oscillatory Fermi energy Density of states DOS at constant magnetic field DOS at constant energy Edge channels Edge channels in a Hall bar Integer filling factor Reading Chapter 13.1-4: Multiterminal Lanauer-Büttiker Theory Chapter 16.1-3: Electron in a magnetic field, SdH effect, integer QHE