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Transcript 
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
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