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Originalveröffentlichung
DOI: 10.1016/S0921-4526(90)80933-A
Scopus
Zitationen: 1

Imaging of spatial structures of fiske-, shapiro-, and photon-assisted tunnelling step states in Josephson tunnel junctions

Doderer, T.; Mayer, B.; Kruelle, C.; Huebener, R.P.; Quenter, D.; Niemeyer, J.; Fromknecht, R.; Poepel, R.; Ustinov, A.V.; Klein, U.; Hinken, J.H.

Abstract:
Using Low Temperature Scanning Electron Microscopy (LTSEM) the Fiske-Steps generated in a Josephson tunnel junction in the presence of a magnetic field have been studied. Spatial structures of the beam-induced change of the maximum step currents and also of the voltage signals of current biased step states have been observed with a spatial resolution of a few μm. In combination with a microwave source LTSEM offers the possibility to study the spatial distribution of rf-induced constant-voltage steps (Shapiro-steps) and of photon-assisted tunnelling steps. In the former case the spatial distribution of the maximum step current of various Shapiro-steps has been imaged. In the latter case we obtained evidence for the nucleation of an inhomogeneous energy gap state in the junction electrodes due to microwave irradiation.


Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 1990
Sprache Englisch
Identifikator ISSN: 0921-4526, 1873-2135
KITopen-ID: 1000078032
Erschienen in Physica / B
Band 165-166
Heft Part 1
Seiten 167–168
Nachgewiesen in Scopus
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