GOLDOBIN, E.; KOELLE, D.; KLEINER, R.; BUZDIN, Alexandre I.

doi:10.1103/PhysRevB.76.224523

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GOLDOBIN, E.
Physikalisches Institut II-Experimentalphysik II

KOELLE, D.
Physikalisches Institut II-Experimentalphysik II

KLEINER, R.
Physikalisches Institut II-Experimentalphysik II

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Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2007, vol. 76, n° 22, p. 224523 (13)

American Physical Society

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Several recent experiments revealed a change of the sign of the first harmonic in the current-phase relation of Josephson junctions (JJ) based on novel superconductors, e.g., d-wave based or JJ with ferromagnetic barrier. In this situation the role of the second harmonic becomes dominant and it determines the scenario of a 0-pi transition. We discuss different mechanisms of the second harmonic generation and its sign. If the second harmonic is negative the 0-pi transition becomes continuous and the realization of the so-called varphi junction is possible. We study the unusual properties of such a novel JJ and analyze the possible experimental techniques for their observation.< Leer menos

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Josephson junctions with second harmonic in the current-phase relation: Properties of Phi-junctions

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