Modeling the power flow in normal conductor-insulator-superconductor junctions

Autor:	M. F. Cunningham, Sunil Golwala, C. A. Mears, J. P. Castle, Simon E. Labov, Bernard Sadoulet, H. Netel, B. Neuhauser, Matthias Frank, O. B. Drury, J. Jochum, F. P. Lipschultz
Rok vydání:	1998
Předmět:	Superconductivity Physics Cryostat Condensed matter physics Phonon General Physics and Astronomy Insulator (electricity) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Conductor Heat flux Condensed Matter::Superconductivity Electrode Quasiparticle Caltech Library Services
Zdroj:	Journal of Applied Physics. 83:3217-3224
ISSN:	1089-7550 0021-8979
Popis:	Normal conductor-insulator-superconductor (NIS) junctions promise to be interesting for x-ray and phonon sensing applications, in particular due to the expected self-cooling of the N electrode by the tunneling current. Such cooling would enable the operation of the active element of the sensor below the cryostat temperature and at a correspondingly higher sensitivity. It would also allow the use of NIS junctions as microcoolers. At present, this cooling has not been realized in large area junctions (suitable for a number of detector applications). In this article, we discuss a detailed modeling of the heat flow in such junctions; we show how the heat flow into the normal electrode by quasiparticle back-tunneling and phonon absorption from quasiparticle pair recombination can overcompensate the cooling power. This provides a microscopic explanation of the self-heating effects we observe in our large area NIS junctions. The model suggests a number of possible solutions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24cf1067fe4655250fe4f58cf39eac39 https://doi.org/10.1063/1.367121 Zobrazit plný text záznamu