Matches in SemOpenAlex for { <https://semopenalex.org/work/W1779108883> ?p ?o ?g. }
- W1779108883 abstract "We consider a superconducting nanowire proximity coupled to a superconductor/ferromagnet/superconductor (S/F/S) junction, where the magnetization penetrates into a superconducting segment in a nanowire decaying as $ensuremath{sim}exp[ensuremath{-}frac{ensuremath{mid}nensuremath{mid}}{ensuremath{xi}}]$, where $n$ is the site index and the $ensuremath{xi}$ is the decay length. We tune chemical potential and spin-orbit coupling so that the topological superconducting regime hosting the Majorana fermion is realized for long $ensuremath{xi}$. We find that when $ensuremath{xi}$ becomes shorter, zero energy state at the interface between a superconductor and a ferromagnet splits into two states at nonzero energy. Accordingly, the behavior of the Josephson current is drastically changed due to this ``zero mode-nonzero mode crossover.'' By tuning the model parameters, we find an almost second-harmonic current-phase relation $sin2ensuremath{varphi}$, where $ensuremath{varphi}$ is the phase difference of the junction. Based on the analysis of Andreev bound state (ABS), we clarify that the current-phase relation is determined by coupling of the states within the energy gap. We find that the emergence of crossing points of ABS is a key ingredient to generate $sin2ensuremath{varphi}$ dependence in the current-phase relation. We further study both the energy and $ensuremath{varphi}$ dependence of pair amplitudes in the ferromagnetic region. For large $ensuremath{xi}$, an odd-frequency spin-triplet $stext{-wave}$ component is dominant. The magnitude of the odd-frequency pair amplitude is enhanced at the energy level of ABS." @default.
- W1779108883 created "2016-06-24" @default.
- W1779108883 creator A5036045927 @default.
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- W1779108883 creator A5088380271 @default.
- W1779108883 date "2016-01-12" @default.
- W1779108883 modified "2023-10-15" @default.
- W1779108883 title "Josephson current in a normal-metal nanowire coupled to a superconductor/ferromagnet/superconductor junction" @default.
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- W1779108883 doi "https://doi.org/10.1103/physrevb.93.024509" @default.
- W1779108883 hasPublicationYear "2016" @default.
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