A. Galeeva, A. Parafin, D. Masterov, S. A. Pavlov, A. Pankratov, S. Danilov, L. Ryabova, D. Khokhlov
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引用次数: 0
Abstract
We have studied photoconductivity under the action of strong laser terahertz pulses in optimally doped and underdoped films of the high-Tcsuperconductor YBa2Cu3O7-δin the vicinity of the critical temperature. In the optimally doped film, the negative photoconductivity with delayed signal increment and decay has been observed. In the underdoped film, a fast positive photoresponse has been detected on top of the negative photoconductivity background at temperatures above the transition temperature. Possible mechanisms responsible for the effects observed are discussed.
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