Resonant Cavity Modes in Bi2Sr2CaCu2O8+x Intrinsic Josephson Junction Stacks
| Autor: | Andrey B. Ermakov, Reinhold Kleiner, Yoshiyuki Yoshida, Xianjing Zhou, Chao Han, Raphael Wieland, Eric Dorsch, Wanghao Tian, Wei Chen, Dieter Koelle, Zuyu Xu, Yang-Yang Lv, Huili Zhang, Zaidong Qi, Huabing Wang, Nickolay V. Kinev, Peiheng Wu, Shigeyuki Ishida, Olcay Kizilaslan, Valery P. Koshelets, Marc Ziegele, Tong Qing, Hiroshi Eisaki |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Josephson effect Condensed matter physics Terahertz radiation General Physics and Astronomy Hot spot (veterinary medicine) Biasing 02 engineering and technology Resonant cavity 021001 nanoscience & nanotechnology 01 natural sciences Phase locking Cuprate superconductor Condensed Matter::Superconductivity 0103 physical sciences Heat equation 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Applied. 11 |
| ISSN: | 2331-7019 |
| DOI: | 10.1103/physrevapplied.11.044004 |
| Popis: | Stacked intrinsic Josephson junctions in the cuprate superconductor Bi${}_{2}$Sr${}_{2}$CaCu${}_{2}$O${}_{8+x}$ are eagerly investigated as a compact source of coherent terahertz radiation. The authors study the mechanisms of frequency tuning of this source at high and low bias. At high bias, in the presence of a hot spot, the emission frequency ${f}_{e}$ is continuously tunable via changing the bias current and the bath temperature, but at low bias ${f}_{e}$ remains discrete, indicating phase locking to cavity resonances, though some groups of junctions seem to remain unlocked. Though some differences appear, these phenomena can be reproduced in simulations combining electrodynamics and heat diffusion. |
| Databáze: | OpenAIRE |
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