Motion of cooper pairs in superconductor

In summary, a superconductor is a material that can conduct electricity without any energy loss due to its zero electrical resistance property. This is achieved at very low temperatures, close to absolute zero. Cooper pairs, pairs of electrons that move in a coordinated manner, are essential for superconductivity. In a superconductor, cooper pairs move as a single entity due to strong electron coupling, facilitated by lattice vibrations or phonons. The Meissner effect, the expulsion of magnetic fields, is a direct result of the motion of cooper pairs, allowing superconductors to maintain their zero resistance even in the presence of external magnetic fields.
  • #1
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I have learned that as temperature decreases, the motion of particles in a lattice decreases.Then how can a cooper pair move so swiftly across the lattice when temperature is considerably low?Can anyone please explain?
 
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  • #2
all electrons in a lattice cannot have their momenta go to zero due to Pauli exclusion principle. the lowest energy electrons are actually the one that are most easily excited. ironically they have a very large velocity called Fermi velocity. For most metals its around [itex]10^6 m/s[/itex]. Cooper pairing occurs for electrons that have velocity close to Fermi velocity.
 

Related to Motion of cooper pairs in superconductor

What is a superconductor?

A superconductor is a material that has zero electrical resistance and can conduct electricity without any energy loss. It is able to achieve this state at very low temperatures, usually near absolute zero.

What are cooper pairs?

Cooper pairs are pairs of electrons that are bound together and move in a coordinated manner in superconductors. This pairing is essential for superconductivity to occur.

How do cooper pairs move in a superconductor?

In a superconductor, cooper pairs move as a single entity due to the strong coupling between the electrons. This allows them to move without any resistance, resulting in the zero electrical resistance property of superconductors.

What is the role of lattice vibrations in the motion of cooper pairs?

Lattice vibrations, also known as phonons, play a crucial role in the motion of cooper pairs. These vibrations create an attractive force between the electrons, leading to the formation of cooper pairs and facilitating their coordinated movement.

What is the significance of the Meissner effect in the motion of cooper pairs?

The Meissner effect is the expulsion of magnetic fields from the interior of a superconductor. This effect is a direct result of the motion of cooper pairs, which creates an opposite magnetic field to cancel out any external magnetic fields. This allows superconductors to maintain their zero resistance property even in the presence of external magnetic fields.

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