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 source impedance
Background
I am an electrical engineer. My friend is a technician in a physics lab and he is using an electromagnetic flow meter (i.e. magmeter) which relies on the Hall effect to measure the flow ...
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About the relationship between Hall coefficient and carrier concentration
I had a question while studying the Hall effect.
After going through various intermediate processes, the Hall coefficient can be derived as follows,
$R_H=\frac{1}{qn},$
where $q$ is the quantity of ...
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Please explain Hall effect in p type semiconductors without the use of holes [closed]
The movement of holes means the movement of electrons in opposite direction, so in Hall Effect the particles on which force is applied finally must be electrons, so there must be no positive charge ...
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Why force by electric field is appearing?
I want to ask about the Hall effect. Why is the force by the electric field appearing?
I can understand the appearance of the Lorentz force. However, I do not know for what reason the force due to the ...
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What is the correct type of the Berry curvature?
I am studying Berry curvature for a specific material and faced different types of the Berry curvature formula. Some papers use only valence eigenstates (u1) like this $$i*(<(∂U1/∂kx)| (∂U1/∂ky)>...
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How can we tell if we have ordinary or anomalous Hall conductivity?
Based on the Hall optical conductivity graph, how can we tell if we have ordinary or anomalous Hall conductivity?
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How to separate electron and hole mobilities in a intrinsic semiconductor?
I read in textbooks that the electric conductivity of a semiconductor is $\sigma=q(n\mu_n+p\mu_p)$, where $q$ is an electron's charge, $n$ and $p$ are the concentrations of electrons and holes, $\mu_n$...
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Hall voltage vs frame dependent electric field in conductor
The hall voltage is created by a current in a magnetic field.
Similarly, a non current carrying conductor in an electric and magnetic field will appear to have a voltage in a different reverence frame....
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Can one Short a Hall Bar?
Consider a classical Hall bar, no quantum effects. If a magnetic field is applied the standard undergraduate treatment tells us that the Lorentz Force will lead to a build up of excess charge on one ...
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Classical and quantum Hall effects
I am trying to understand the hall effects and have a few problems with them.
So let's consider the classical Hall effect. We know that we consider a sample, where the electrons flow, we apply the ...
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Quantum Hall effect diverges at $B=0$
In the integer quantum Hall effect, with the applied magnetic field reduced, more and more LLs get filled and one can observe higher and higher plateaus in the Hall conductivity $\sigma_H(B)$. ...
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Variation of Current In The Hall Effect Experiment
As a 12th Grader, our class came across a very simple setup of the Hall Effect Experiment during our course on Electromagnetism. The entire idea and eventual steady state conditions all make perfect ...
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Electric field shielding by a metal plate
I was watching this video on Hall effect, and to demonstrate that it is not electric fields that are bending the electron beam, the presenter puts a metal plate between the magnet and the beam.
So, my ...
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Impact of thickness of metal on hall effect
I was reading the paper on the Hall Effect and found that the initial experiment was performed on a metal strip. The experiment on the metal failed to provide any useful results, and then it was ...
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Is diamagnetic part of conductivity always longitudinal/diagonal?
The Kubo formula for linear response is given as $$\sigma_{ab}(\omega)=\frac{i}{\omega}[\Pi_{ab}(\omega)-\Pi_{ab}(\omega=0)]$$ with $\Pi$ the current-current correlation. It is often claimed that the ...
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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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