Terahertz Photoconductivity in Optimally and Underdoped YBa2Cu3O7-δ

We have studied photoconductivity under the action of strong laser terahertz pulses in optimally doped and underdoped films of the high-T c superconductor YBa 2 Cu 3 O 7- δ in the vicinity of the critical temperature. In the optimally doped film, the negative photoconductivity with delayed signal in...

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Bibliographic Details
Published in2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) pp. 1 - 2
Main Authors Galeeva, Alexandra V., Parafin, Alexey E., Masterov, Dmitry V., Pavlov, Sergey A., Pankratov, Andrey L., Danilov, Sergey N., Ryabova, Ludmila I., Khokhlov, Dmitry R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2018
Subjects
Laser excitation
Photoconductivity
Physics
Superconducting transition temperature
Yttrium barium copper oxide
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Summary:We have studied photoconductivity under the action of strong laser terahertz pulses in optimally doped and underdoped films of the high-T c superconductor YBa 2 Cu 3 O 7- δ in 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.
ISSN:2162-2035
DOI:10.1109/IRMMW-THz.2018.8510113