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The resistance anomaly in the surface layer of Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ single crystals under radio-frequency irradiation

Nam Kim·Hyun-Sik Chang·Hu-Jong Lee·Yong-Joo Doh
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Abstract

We observed that radio-frequency (rf) irradiation significantly enhances the $c$-axis resistance near and below the superconducting transition of the CuO$_{2}$ layer in contact with a normal-metal electrode on the surface of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+x}$ single crystals. We attribute the resistance anomaly to the rf-induced charge-imbalance nonequilibrium effect in the surface CuO$_{2}$ layer. The relaxation of the charge-imbalance in this highly anisotropic system is impeded by the slow quasiparticle recombination rate, which results in the observed excessive resistance.

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Nam Kim, Hyun-Sik Chang, Hu-Jong Lee, Yong-Joo Doh. 2000-03-20. The resistance anomaly in the surface layer of Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ single crystals under radio-frequency irradiation. https://doi.org/10.1016/s0921-4534(00)01777-9

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