Phys. Rev. B 56, 8396–8403 (1997)Probing the collective Josephson plasma resonance in Bi2Sr2CaCu2O8+y by W-band-mixing experimentsReceived 25 April 1997; published in the issue dated 1 October 1997 We report on W-band-mixing experiments with mesa structures patterned on top of Bi2Sr2CaCu2O8+y single crystals. Due to the intrinsic Josephson effect the mixing process could be observed. There is a steep increase of the mixing intensity when the bias current approaches the critical current. We show that the mixing response is related to the excitation of the collective Josephson plasma resonance. In magnetic fields we observed a decrease of the Josephson plasma frequency. From this dependence we were able to estimate the frequency of the Josephson plasma resonance for zero bias and zero field ranging from 105 to 220 GHz. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.56.8396
DOI:
10.1103/PhysRevB.56.8396
PACS:
74.50.+r, 72.30.+q, 74.72.Hs, 84.30.Qi
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