Abstract
We introduce the concept of orbital glass, which state may exist in granular superconductors. An orbital glass is a state with chaotically distributed circular orbital currents. Recent very unusual experimental data may be consistent with the concept. For instance, the Meissner effect may disappear. We illustrate the properties of the state by some examples. The new state with orbital moments is characterized by the coexistence of the orbital paramagnetic state with the superconducting state. The critical field H c0 of the orbital paramagnetic glass transition is inversely proportional to the surface area S of an average loop of Josephson junctions or the cross-area of an average grain.
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