A Why the physical meaning of the quantum Hall effect is important

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1. Mar 29, 2017

skyhj105

From classical hall effect, we can get some information about kind of charge carrier, charge density etc.
So, it is important for understanding matter.
But, I dont know why quantum hall effect is important in graphene transport measurement.
Its consequence is just a quantization of conductance and by this quantization, we can conclude this electronic system is just a 2D.

2. Mar 30, 2017

f95toli

Because I) it tells us quite a lot about the materials and II) graphene can be used to make a quantum Hall resistance standard, so it is an important application (it is still not used routinely, but that will happen quite soon)

3. Mar 30, 2017

skyhj105

But your answer is too abstract for me to understand. Can you give me a example of property judged by quantum hall effect?

4. Mar 30, 2017

Dr Transport

graphene is a 2-d system, the quantum Hall effect becomes extremely important.

5. Apr 3, 2017

skyhj105

The reason why it is important is that it is a evidence of 2D electronic structure. Is it right? and That`s all???

6. Apr 3, 2017

f95toli

It is not clear to me what you are actually asking.
*Are you wondering why there is so much interest in the QHE in graphene?
*Are you wondering what you can learn from measurements of the QHE in graphene?

The two questions are of course related, but the main answer to the first questions is that QHE based resistance standards is an important -practical- application of graphene; if it wasn't for this fact there wouldn't be nearly as much interest in this topic.