Questions tagged [hall-effect]
The Hall effect is a voltage arising from an electric field perpendicular to a magnetic field in a material. It is to be distinguished from the quantum hall effect (QHE).
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Hall Effect on a spiral [closed]
A flat spiral in immersed in a homogeneous magnetic field. An electric current is flowing in the spiral. The directions of the B field, the spiral and the current can be seen in the picture. As the ...
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All closed orbits in semiclassical model
I'm studying from "Solid State Physics" by Ashcroft-Mermin. In particular, in chapter 12 it talks about the semiclassical model and tries to reason about the Hall effect in the limiting case ...
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Is current density independent of applied fields for Bloch electrons?
Following Ashcroft-Mermin chapter 12 the semiclassical dynamics is governed by
$
\dot{\vec{r}} = \vec{v}_n(\vec{k}) = \frac{1}{\hbar}\frac{\partial \epsilon_n(\vec{k})}{\partial \vec{k}}
$
and
$
\hbar ...
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Hall effect of Metal and Semiconductor [duplicate]
I am pretty much confused in the topic of Hall effect, as it is discussed in Metals and Semiconductor. My question is -
Hall effect in Metals is due to electron as they are in majority, so hall ...
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Shubnikov-de-Haas effect and Quantum Hall effect
I am wondering if these two phenomena are two names for the same thing or whether these are distinct effects and there are situation where one appears, but the other one doesn't?
Both seem to produce ...
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Why does the presence of magnetoresistive effects indicate the existence of multiple types of charge carriers in a material?
I am currently enrolled in a solid state physics course, and have just completed a lecture on the Hall effect, though it did not go into too much detail. It was mentioned that with van der pauw ...
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Hall effect in a conducting ring
Consider a conducting ring moving through a uniform magnetic field of magnitude $B$, with speed $v$. To visualise, suppose the magnetic field is directed out of the page and the ring is moving ...
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Can you measure hall voltage for holes and electrons in the same time?
I have an experiment on hall effect, and the goal is to determine hall coefficient and determine what type of the material it is, using Uh=f(B) graph. The table of results show two columns of measure ...
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Hall sensor for electric(!) field?
Is it (in principle) possible to measure the strength of an electic(!) field with a hall sensor?
I think so, for the following reasons:
The hall sensor is a conductor. If we place an conductor in an ...
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Hall effect for a magnet falling through a copper pipe?
A falling magnet in a copper pipe exerts a Lorentz force on the electrons that participate in the eddy currents a and b. I mean the vertical magnetic force $F = Bqv$, denoted by the blue arrows in the ...
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Why are the plateaus in the Quantum Hall horizontal rather than diagonal
I was wondering why the plateaus of $\rho_{xy}$ in the integer quantum Hall effect are horizontal and do not scale linearly with the magnetic field $B$ since the Lorentz force should still be acting ...
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Hall effect: Do the charges that build up on the sides of conductor kept in uniform magnetic field get uniformly distributed?
When we keep a metal block through which some constant current is flowing in a uniform magnetic field the charges will separate and a potential difference will be created b/w the sides of the ...
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Does a current carrying conductor carry a net total charge or only a net bulk charge?
I would like to start a discussion in which we have an ongoing debate elsewhere with no convincing solution in sight. So I decide to ask here:
The question is mainly academic: Is a current carrying ...
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How does the conductivities of metals and semiconductors vary when placed in the presence of magnetic field?
Suppose you have two materials one is a metal and other is a heavily doped semiconductor and they are placed in a magnetic field. What experiment will you do to distinguish between them? Does the ...
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What does it mean to say that the majority carriers are holes?
Even when there are holes, the holes move only because electrons are jumping from one hole to the next. So why doesn't it make sense to say that electrons are the majority carriers in p-type ...
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