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 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 Unlike the conventional Hall effect, the role of the external magnetic field $\vec{B}$ has been replaced by the effective ...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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Reference request: Hall current in heterojunctions

I am interested in Hall current derivation for a heterojunction via Green functions formalism. Any papers with specific systems will be useful for me. I expect that this derivation should be based on ...
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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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Magnetic field dependence of resistance

Experimentally, under the application of an external perpendicular magnetic field, we observe a change in the longitudinal resistance. However, in the theoretical development starting from the Drude ...
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Loss mechanisms in spin Hall effect (and inverse spin Hall effect with spin pumping)

What are the most important loss mechanisms in the spin Hall effect and the inverse spin hall effect? I use input power $P_1$ to generate a charge current, which will generate a spin current which ...
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Simulation of Spin Hall effect

Is there commercial software available which takes the spin Hall effect into account? I know HFSS and Comsol are popular EM solvers. In my case, I have a piece of metal and a permanent magnet ...
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Current generated due to spin pumping

Suppose I have a heavy metal (e.g. Pt) and a magnetized magnet adjacent to it (e.g. Co). A spin current $J_s$ results in a current $J_e=J_s/\theta$ where $\theta$ is the spin-hall conductance. When ...
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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 ...
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Zero resultant force on a wire due to hall effect

If we have a current carrying wire in a uniform magnetic field , will the wire keep moving due to that magnetic field ? After reading about the hall effect i think that the wire will move at 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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In Hall Effect Thrusters, how is the radial magnetic field generated?

In Hall Effect thrusters, there is a radial magnetic field coming out of the center of the thruster, and runs perpendicularly to an electric field. In most of the diagrams I've seen there is an inner ...
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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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Classical hall effect with two parallel electron channels

Does someone know how to derive the classical result of effective carrier density and effective mobility in the presence of low magnetic fields. The system is 2DEG in the classical drude limit
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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 ...