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Josephson effects between the Kitaev ladder superconductors
by Osamu Kanehira, Hiroki Tsuchiura
Submission summary
| Authors (as registered SciPost users): | Hiroki Tsuchiura |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2302.08828v1 (pdf) |
| Date accepted: | April 24, 2023 |
| Date submitted: | Feb. 20, 2023, 10:36 a.m. |
| Submitted by: | Hiroki Tsuchiura |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | International Conference on Strongly Correlated Electron Systems (SCES2022) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
The two-leg ladder system consisting of the Kitaev chains is known to exhibit a richer phase diagram than that of the single chain. We theoretically investigate the variety of the Josephson effects between the ladder systems. We consider the Josephson phase difference $\theta$ between these two ladder systems as well as the phase difference $\phi$ between the parallel chains in each ladder system. The total energy of the junction at $T = 0$ is calculated by a numerical diagonalization method as functions of $\theta$, $\phi$, and also a transverse hopping $t_{\perp}$ in the ladders. We find that, by controlling $t_{\perp}$ and $\phi$, the junction exhibits not only the fractional Josephson effect for the phase difference $\theta$, but also the usual 0-junction and even $\pi$-junction properties.
Author comments upon resubmission
List of changes
We have revise the manuscript in accordance with all of the following points: 1- p2: are also affect -> also affect 2- p2: Maiellaro et al. has shown -> Maiellaro et al. have shown 3- p4: while I understand how fig 2a represents the 4π periodic case, it would be good to mention that the 4π period arises due to a crossing of two curves at θ=π (which as such is not visible in the figure) 4- p6: always appear -> always appears 5-p6: omit the sentence: Acknowledgements should follow immediately after the conclusion.
Published as SciPost Phys. Proc. 11, 014 (2023)