Macroscopic quantum coherence effects in microwave emission from high-tc superconducting films

G. Jung, J. Konopka

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Macroscopic quantum coherence effects have been observed in X-band emission from current-biased high-Tc films. Two groups of excess emission lines, current stable lines and voltage stable lines, were distinguished in the emission spectra by their different behaviour with changing temperature and magnetic field. The electromagnetic energy was found to be radiated by synchronized clusters composed of only a few intergranular Josephson junctions. Current stable lines are related to coupled two-junction quantum interferometers. Voltage stable lines are due to clusters composed of a few connected single junctions or to a large single junction with pronounced structural fluctuations.

Original languageEnglish
Pages (from-to)183-188
Number of pages6
JournalEPL
Volume10
Issue number2
DOIs
StatePublished - 15 Sep 1989
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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