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Title: Non-Josephson Emission from Intrinsic Junctions in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8 +{ital y}} : Cherenkov Radiation by Josephson Vortices

Journal Article · · Physical Review Letters
; ; ;  [1]
  1. Physikalisches Institut III, Universitaet Erlangen-Nuernberg, D-91058 Erlangen (Germany)

We have investigated Josephson vortex flow in intrinsic junctions in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+y}. In addition to the Josephson radiation we find a strong broadband non-Josephson microwave emission which is not expected for conventional junctions. We explain this non-Josephson signal by Cherenkov radiation occurring when the vortex velocity exceeds the lowest of the N possible mode velocities for electromagnetic waves in an N junction stack. {copyright} {ital 1997} {ital The American Physical Society}

OSTI ID:
560634
Journal Information:
Physical Review Letters, Vol. 79, Issue 7; Other Information: PBD: Aug 1997
Country of Publication:
United States
Language:
English