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The dielectric constant, or more appropriately, the dielectric function, can be thought of as a measure of screening. A simple relation for which to picture this is: $V_{eff} = V_{ext}/\epsilon$ Therefore, in TMDs, since the electrons are more mobile in the planes, they tend to screen potentials with a greater efficiency. This gives a higher dielectric ...


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The product of the permittivity and permeability is encoded into the geometry of spacetime because the product $\varepsilon_0\mu_0 = 1/c^2$ and the speed of light is special. So the value of the product is telling us about the geometry of spacetime. The relative values of $\varepsilon_0$ and $\mu_0$ tell us about the relative strengths of the electric and ...


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A dielectric slab will be attracted towards any source of electric field, because it is essentially a collection of dipoles. Dipoles in fields align with the fields. If the field varies in space, the dipole is drawn to the local maximum of the field. An intuitive, everyday example of this is the way iron filings are drawn to a magnet. In the case of a ...


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A capacitance bridge setup is good. One branch contains the known variable capacitance and a resistor. The other arm a resistor and the ferroelectric material. Adjust the known for null output.


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A simple way to do this requires an LCR (inductance, capacitance, resistance) meter, an oven/furnace/hotplate, and a thermocouple. With an LCR meter, you can measure the capacitance as well as the loss tangent, $ \delta $ at the same time. If you attach a thermocouple to the sample, and ramp the temperature slowly (less than 1 Celcius/min), you can measure ...



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