Planck's constant measurement by Landauer quantization for student laboratories

A simple experimental setup for measuring Planck's constant, using Landauer quantization of the conductance between touching gold wires, is described. It consists of two gold wires with thickness of and length, and an operational amplifier. The setup costs less than $30 and can be realized in e...

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Bibliographic Details
Published in:European journal of physics 2015-09, Vol.36 (5), p.55047-13
Main Authors: Damyanov, Desislav S, Pavlova, Iliana N, Ilieva, Simona I, Gourev, Vassil N, Yordanov, Vasil G, Mishonov, Todor M
Format: Article
Language:English
Subjects:
Conductance
conductance quantum
Constants
Education
Gold
Landauer quantization of conductivity
measurement
Oscilloscopes
Planck's constant
Quantization
Students
Wire
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Summary:A simple experimental setup for measuring Planck's constant, using Landauer quantization of the conductance between touching gold wires, is described. It consists of two gold wires with thickness of and length, and an operational amplifier. The setup costs less than $30 and can be realized in every teaching laboratory in two weeks. The use of an oscilloscope is required.
ISSN:0143-0807
1361-6404
DOI:10.1088/0143-0807/36/5/055047