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lufc88
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Does the cooper pairs spins (up and down) cancelling out have anything to do with anything? Is the current spin polarized in a superconductor?
Cooper pairs are pairs of electrons that are bound together within a superconductor due to the attractive force between them caused by lattice vibrations. This pairing is known as the BCS theory, which explains how the electrons overcome their repulsive forces and form pairs at low temperatures.
Spin plays a crucial role in the formation of Cooper pairs. In a superconductor, the spin of the electrons is aligned in opposite directions, allowing them to overcome their repulsive forces and form pairs. This results in a net spin of zero for the Cooper pair, which is one of the defining characteristics of superconductivity.
Cooper pairs are the underlying mechanism behind superconductivity. When electrons are paired up, they can move through the superconductor without any resistance, resulting in a state of zero electrical resistance and perfect conductivity. This phenomenon is only possible due to the formation of Cooper pairs.
In the presence of an external magnetic field, Cooper pairs will start to break apart due to the repulsive forces between the electrons. This results in a decrease in the superconducting properties of the material, as the electrons are no longer able to move freely without resistance. However, there are certain types of superconductors, known as type II, that can still maintain superconductivity in the presence of a weak external magnetic field.
No, Cooper pairs require very low temperatures to form and exist. At room temperature, thermal energy is too high for the electrons to form pairs and overcome their repulsive forces. However, there have been recent advancements in high-temperature superconductors, which can maintain superconductivity at higher temperatures, but still well below room temperature.