Current-Voltage Relations in d-wave Josephson Junctions: Effects of Midgap Interface States

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dc.creatorLofwander, T.
dc.creatorJohansson, G.
dc.creatorWendin, G.
dc.date1999-08-18
dc.date.accessioned2026-07-07T03:14:16Z
dc.date.available2026-07-07T03:14:16Z
dc.descriptionWe investigate the dc current-voltage characteristics of d-wave Josephson junctions, where the barrier at the interface may have arbitrary strength. Dividing the current into n-particle currents $I_n$ (n integer), we can explicitly show which physical processes are responsible for the subharmonic gap structure (SGS). For orientations where midgap states (MGS) exist, the resonances in the n-particle processes are drastically changed, giving rise to a strongly modified SGS. Introducing broadening in a phenomenological way, we show that MGS may produce a current peak near zero bias and we explain which physical processes are contributing to this peak. The agreement of our theory with recent experiments is discussed.
dc.description5 pages, (will appear in Journal of Low Temperature Physics, MOS-99 proceedings)
dc.identifierhttps://arxiv.org/abs/cond-mat/9908261
dc.identifierhttp://arxiv.org/abs/cond-mat/9908261
dc.identifierJ. Low Temp. Phys. 117, 593 (1999).
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29606
dc.subjectSuperconductivity
dc.titleCurrent-Voltage Relations in d-wave Josephson Junctions: Effects of Midgap Interface States
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