Forsthofer, F. and Kind, S. and Keller, Joachim (1996) Collective modes in the electronic polarization of double-layer systems in the superconducting state. PHYSICAL REVIEW B, 53 (21). pp. 14481-14495. ISSN 0163-1829
Full text not available from this repository.Abstract
Standard weak-coupling methods are used to study collective modes in the superconducting state of a double-layer system with intralayer and interlayer interaction, as well as a Josephson-type coupling and single-particle hopping between the layers by calculating the electronic polarization function perpendicular to the layers. Analytical results are derived for the mode frequencies corresponding to fluctuations of the relative phase and amplitude of the layer order parameters in the case of interlayer pairing and finite hopping t. An effect is found for finite k-dependent hopping: then the amplitude and phase fluctuations are coupled. Therefore two collective modes may appear in the dynamical c-axis conductivity below the threshold energy for breaking Cooper pairs. With help of numerical calculations we investigate the temperature dependence of the collective modes and show how a plasmon corresponding to charge fluctuations between the layers evolves in the normal state.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED-ACTIVE PHONONS; RENORMALIZATION; PLASMONS |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Joachim Keller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Jul 2023 06:00 |
| Last Modified: | 06 Jul 2023 06:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51691 |
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