Probing superconducting transition in underdoped La2-xSrxCuO4 by low-temperature resistance noise spectroscopy

Xiaoyan Shi; Zhenzhong Shi; Dragana Popović

doi:10.1117/12.2267197

28 February 2017 Low-temperature resistance noise spectroscopy as a probe of the superconducting transition in underdoped La_2-xSr_xCuO₄

Xiaoyan Shi, Zhenzhong Shi, Dragana Popović

Author Affiliations +

Proceedings Volume 10105, Oxide-based Materials and Devices VIII; 1010503 (2017) https://doi.org/10.1117/12.2267197
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

We report the resistance noise spectroscopy technique and its applications in detecting the nature of high- temperature superconducting transition in cuprates. In underdoped La_2-xSr_xCuO₄ thick films, in which inter- layer coupling is relatively weak and thus the system is effectively two-dimensional, resistance noise spectroscopy shows the first experimental evidence of intrinsic correlated dynamics near the superconducting transition of the Berezinskii-Kosterlitz-Thouless type. In particular, resistance fluctuations in the low-temperature ordered phase are correlated, slow and nonergodic, i.e., the system exhibits properties that cannot be fully detected in any reasonable experimental time frame.

Citation Download Citation

Xiaoyan Shi, Zhenzhong Shi, and Dragana Popović "Low-temperature resistance noise spectroscopy as a probe of the superconducting transition in underdoped La_2-xSr_xCuO₄", Proc. SPIE 10105, Oxide-based Materials and Devices VIII, 1010503 (28 February 2017); https://doi.org/10.1117/12.2267197

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