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https://hdl.handle.net/11147/2475
Title: | Thermal Management in Large Bi2212 Mesas Used for Terahertz Sources |
Authors: | Kurter, Cihan Gray, Kenneth E. Zasadzinski, John F. Özyüzer, Lütfi Koshelev, A. E. Li, Q. Yamamoto, T. Kadowaki, K. Kwok, W. K. Tachiki, M. Welp, U. |
Keywords: | Crystal structure Intrinsic josephson junctions Joule heating Mesa structure Terahertz emission |
Publisher: | Institute of Electrical and Electronics Engineers Inc. |
Source: | Kurter, C., Gray, K. E., Zasadzinski, J. F., Özyüzer, L., Koshelev, A. E., Li, Q., Yamamoto, T., Kadowaki, K., Kwok, W. K., Tachiki, M., and Welp, U. (2009). Thermal management in large Bi2212 mesas used for terahertz sources. IEEE Transactions on Applied Superconductivity, 19(3), 428-431. doi:10.1109/TASC.2009.2019235 |
Abstract: | We present a thermal analysis of a patterned mesa on a Bi 2Sr2CaCu2O8 (Bi2212) single crystal that is based on tunneling characteristics of the c-axis stack of ∼800 intrinsic Josephson junctions in the mesa. Despite the large mesa volume (e.g., 40 × 300 × 1.2 μm3) and power dissipation that result in self-heating and backbending of the current-voltage curve (I-V), there are accessible bias conditions for which significant polarized THz-wave emission can be observed. We estimate the mesa temperature by equating the quasiparticle resistance, Rqp(T), to the ratio V/I over the entire I-V including the backbending region. These temperatures are used to predict the unpolarized black-body radiation reaching our bolometer and there is substantial agreement over the entire I-V. As such, backbending results from the particular R qp (T) for Bi2212, as first discussed by Fenton, rather than a significant suppression of the energy gap. This model also correctly predicts the observed disappearance of backbending above ∼60 K. |
URI: | http://doi.org/10.1109/TASC.2009.2019235 http://hdl.handle.net/11147/2475 |
ISSN: | 1051-8223 1051-8223 |
Appears in Collections: | Physics / Fizik Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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