Tunable critical supercurrent and spin-asymmetric Josephson effect in superlattices
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2014-02-01
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Language
en
Pages
11
1-11
1-11
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PHYSICAL REVIEW B, Volume 89, issue 6
Abstract
Combining the Josephson effect with magnetism, or spin dependence in general, creates novel physical phenomena. The spin-asymmetric Josephson effect is a predicted phenomenon where a spin-dependent potential applied across a Josephson junction induces a spin-polarized Josephson current. Here, we propose an approach to observe the spin-asymmetric Josephson effect with spin-dependent superlattices, realizable, e.g., in ultracold atomic gases. We show that observing this effect is feasible by studying numerically the quantum dynamics of the system in one dimension. Furthermore, we show that the enhancement, or tunability, of the critical supercurrent in ferromagnetic Josephson junctions [F. S. Bergeret, A. F. Volkov, and K. B. Efetov, Phys. Rev. Lett. 86, 3140 (2001)] can be explained by the spin-asymmetric Josephson effect.Description
Keywords
Josephson effect, Spin-asymmetric Josephson effect, ultracold gases
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Citation
Kreula, J M, Heikkinen, M O J, Massel, F & Törmä, P 2014, ' Tunable critical supercurrent and spin-asymmetric Josephson effect in superlattices ', Physical Review B, vol. 89, no. 6, 064502, pp. 1-11 . https://doi.org/10.1103/PhysRevB.89.064502