TY  - JOUR
A1  - Dobrovolskiy, Oleksandr V.
A1  - Bevz, Volodymyr M.
A1  - Mikhailov, Mikhail Yu.
A1  - Yuzephovich, Olga I.
A1  - Šklovskij, Valerij Aleksandrovič
A1  - Vovk, Ruslan V.
A1  - Tsindlekht, Menachem I.
A1  - Sachser, Roland
A1  - Huth, Michael
T1  - Microwave emission from superconducting vortices in Mo/Si superlattices
T2  - Nature Communications
N2  - Most of superconductors in a magnetic field are penetrated by a lattice of quantized flux vortices. In the presence of a transport current causing the vortices to cross sample edges, emission of electromagnetic waves is expected due to the continuity of tangential components of the fields at the surface. Yet, such a radiation has not been observed so far due to low radiated power levels and lacking coherence in the vortex motion. Here, we clearly evidence the emission of electromagnetic waves from vortices crossing the layers of a superconductor/insulator Mo/Si superlattice. The emission spectra consist of narrow harmonically related peaks which can be finely tuned in the GHz range by the dc bias current and, coarsely, by the in-plane magnetic field value. Our findings show that superconductor/insulator superlattices can act as dc-tunable microwave generators bridging the frequency gap between conventional radiofrequency oscillators and (sub-)terahertz generators relying upon the Josephson effect.
KW  - Electronic properties and materials
KW  - Superconducting devices
KW  - Superconducting properties and materials
Y1  - 2018
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/48543
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-485439
SN  - 2041-1723
N1  - Rights and permissions: Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
VL  - 9
IS  - 1, Art. 4927
SP  - 1
EP  - 9
PB  - Nature Publishing Group UK
CY  - [London]
ER  -