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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How to know a semiconductor is p type or n type from hall effect calculations? [closed]
Using the hall effect calculations how can we determine a semiconductor is p type or n type
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How can we explain that beryllium has positive charge carriers as a metal (from Feynman Lectures)?
This question naturally arises from reading Feynman Lectures Vol III 14-3 The Hall effect, online available here, where Feynman states the following:
The original discovery of the anomalous sign of ...
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How to understand the linear relation between Fermi level $E_F$ and the length $L$ of the slab in Hall effect and spin Hall effect?
I am following this paper to learn the physics of the spin Hall effect. Unlike the conventional Hall effect, the role of the external magnetic field $\vec{B}$ has been replaced by the effective ...
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What is meant by compensating the Hall Voltage?
We're doing an experiment to measure the Hall Voltage as functions of current and magnetic field, and we're meant to Compensate the Hall Voltage for $B=0T$. What does this mean, and why do we do it?
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Spin Hall effect
I am trying to understand the paper by Dyakonov and Perel (1971) "Possibility of orienting electron spins with current", but cannot see how they obtain the phenomenological equations for spin density ...
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What's wrong about Maxwell's equations for a Hall probe?
I am using Maxwell's equation to analyse the current and electric field of a Hall Probe. A Hall probe is basically a thin sheet of metal with a current through it. When a uniform magnetic field $\def\...
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Switching the position of voltage probes changes the sign of the measured voltage. How can you determine the charge sign in a Hall effect then?
When you measure the voltage in a battery, for example, you place the voltage probes at the battery ends and get, let's say, a reading of 1.5V. If you change the position of the probes in regards to ...
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Rotational invariance of the conductivity tensor (Classical Hall Effect)
In classical Hall effect, the conductivity tensor is given as
$\sigma = \frac{\sigma_{DC}}{1+\omega_B^2 \tau^2} \begin{pmatrix}
1 & -\omega_B \tau \\ \omega_B \tau & 1
\end{pmatrix}$
where the ...
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Temperature influence on Hall Effect for semiconductor
Currently, I'm taking a course in modern physics experiments and last week I was asked to study the hall effect in a semiconductor. One of the experiments was with a germanium chip where a steady ...
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Deriving classical Hall effect from quantum Hall effect
I'm interested in the derivation of the classical Hall effect coefficient, given in cgs by $$R_{H}=-\frac{1}{nec},$$ where $n$ is the electron number density, $-e<0$ is the electron charge,and $c$ ...
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Are anomalous Hall effect and spin Hall effect mutually exclusive?
In many papers that cover an analysis of Hall effects, the spin Hall effect is often qualitatively described as being nearly the same as the anomalous Hall effect except for the fact that it doesn't ...
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Topological Hall Effect vs. Anomalous Hall Effect
Is the Topological Hall Effect just another name for the Anomalous Hall Effect in a system that isn't ferromagnetic? That is, will some papers refer to this phenomena as "Topological Hall Effect" ...
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Spot welding technique
I am trying to make electrical contacts by the spot welding technique. For Hall effect measurements, the contact size should be as small as possible and the sample is very very thin (0.025mm). But ...
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Charge carriers type: contradiction between Hall effect and Seebeck effect, how to resolve it?
On one hand the Hall effect consists of a voltage that arises when an electric field and a perpendicular magnetic field are in a material. This makes the charge carriers (electrons or holes) under the ...
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Does the Hall effect increase the resistance of a wire?
If a current in a wire is flowing perpendicular to a magnetic field, the Hall effect is observed. This effect is caused by the forces from magnetic fields pushing the electrons to one side of the wire....
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