| It is a common view that the underlying mechanism of superconductivity is Cooper pairing, giving rise to formation of the condensate of superconducting electrons. We study the quantum phase superconductor-to-insulator transition in disordered TiN superconducting films and find that Cooper pairing leads to a dual macroscopic quantum phenomenon: a zero-conducting or superinsulating state. This state is destroyed by the sufficiently strong critical magnetic field, and breaks down at some critical voltage which is analogous to the critical current in superconductors. |
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