Effect of High-Pressure-Induced Structural Relaxation on Evolution of the Temperature Dependence Pseudogap in HoBa2Cu3O7-δ Single Crystals
Abstract
In present work the influence of high pressure on the conductivity in the basal plane of the oxygen underdoped HoBa2Cu3O7-δ single crystals is investigated. It is found that excess conductivity Δs(Т) in the HoBa2Cu3O7-δ single crystals over a wide temperature range (Tс<Т<T*, where Tc is the critical temperature and T* represents the mean field temperature of the superconducting transition) obeys an exponential temperature dependence. The description of the excess conductivity with Δs~(1-Т/Т*)exp(Δ*ab/T) can be interpreted in terms of mean field theory. The temperature dependence pseudogap is satisfactorily described within the framework of the BCS-BEC crossover.
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References
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