What is the Quantum Hall Effect ?
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The most important applications of the quantum Hall effect (QHE) are in the field of metrology. The observed quantization of the resistance is primarily used for the reproduction of the SI unit ohm, but is also important for high precision measurements of both the fine structure constant and the Planck constant
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The quantum hall effect or integer quantum hall effect is a quantized version of the hall effect and which is observed in two dimensional electron systems subjected to low temperature and strong magnetic fields in which the hall resistance Rxy exhibits steps that take on the quantized values at certain level
Rxy = Vhall/ Ichannel .
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