It naturally behaves as a perfect conductor at room temperature.

Its electrical properties can be precisely controlled through doping, making it highly tunable for electronic devices.

It has no band gap, allowing electrons to move freely like in metals.

It automatically emits photons when a voltage is applied.

It increases the magnetic field inside the material when it becomes superconducting.

It results in magnetic field lines bending around the superconducting region.

It is observed only when the material is below its critical temperature and in the superconducting phase.

It causes magnetic field lines to be expelled from the interior of the superconductor.

Protons and neutrons, which are the building blocks of atoms.

Fermions (matter particles) and bosons (force carriers).

Photons and electrons, as they are the most common particles in the universe.

Quarks and leptons only, as they are the only particles that make up matter.

The graviton, providing evidence for quantum gravity.

The electron neutrino, confirming the existence of neutrino oscillations.

The Higgs boson, which helps explain how other particles acquire mass.

The top quark, completing the set of known quarks in the Standard Model.

Cooper pairs act as bosons and can condense into a collective quantum state.

Cooper pairs move through the crystal without scattering, enabling zero electrical resistance.

Cooper pairs arise from an effective attractive interaction between electrons mediated by lattice vibrations.

Cooper pairs form because electrons strongly repel each other at short distances.

⟨ϕ|ψ⟩ + ⟨ψ|ϕ⟩

|ψ⟩⟨ψ|ϕ⟩

⟨ψ|ϕ⟩

|⟨ϕ|ψ⟩|²