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| E |
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stablished
theory holds that electrons in a metal lose their individual
identities and form a "gas" of quasiparticles-collective entities
with electron-like properties such as energy and momentum-which
experience the electromagnetic field of the solid's crystal
lattice. But if the temperature drops to within a few degrees
of absolute zero, particles can form pairs that move through
the lattice without resistance, and the material becomes superconducting.
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