Subgap structures in the current-voltage characteristic of the intrinsic Josephson effect due to phonons

Details Subgap structures in the current-voltage characteristic of the intrinsic Josephson effect due to phonons Subgap structures in the current-voltage characteristic of the intrinsic Josephson effect due to phonons

1997-01-30

arxiv.org/abs/cond-mat/9701215v2

Physica C 293 (1997),60-63.

Physics

Condensed Matter

Superconductivity

correction of minor misprints, revtex, 3 pages, two postscript figures, aps, epsf, Contributed Paper to the "International Sym

Scientific paper

10.1016/S0921-4534(97)01514-1

A modified RSJ-model for the coupling of intrinsic Josephson oscillations and c-axis phonons in the high-T_c superconductors Tl_2Ba_2Ca_2Cu_3O_{10+\delta} and Bi_2Sr_2CaCu_2O_{8+\delta} is deveoped. This provides a very good explanation for recently reported subgap structures in the I-V-characteristic of the c-axis transport. It turns out that the voltages of these structures coincide with the eigenfrequencies of longitudinal optical phonons, providing a new measurement technique for this quantity. The significantly enhanced microwave emission at the subgap structures in both the GHz and THz region is discussed.

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