Abstract
The influence of room-temperature annealing on the excess conductivity of untwinned single crystal YBa2Cu3O7−x with a small deviation of from oxygen stoichiometry is investigated. It is found that the range of existence of the pseudogap regime undergoes a relative expansion of the range of existence of the pseudogap regime during a four-day period of annealing. The absolute magnitude of the pseudogap decreases by approximately 10%.
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