Abstract
In the superfluid 3He A-phase, the amplitude and direction of angular momentum by topological edge mass current coincide with the expected amplitude and direction of ground-state angular momentum by Cooper pairs. The topological mass current also flows at a domain wall in the A-phase, namely, an interface between the A-phases with the opposite direction of l-vector. We show that the amplitude of the topological mass current at the energetically favorable domain wall is almost equal to that at the specular edge; however, the topological mass current flows toward the opposite direction expected from angular momentum of Cooper pairs. Thus, the direction of topological mass current cannot be fixed only by the topological nature which is related to angular momentum of Cooper pairs.
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Acknowledgements
Numerical calculations were performed by using the RIKEN Integrated Cluster of Clusters (RICC). This work was supported by KAKENHI (No. 24840048).
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Tsutsumi, Y. Mass Current at a Domain Wall in Superfluid 3He A-Phase. J Low Temp Phys 175, 51–55 (2014). https://doi.org/10.1007/s10909-013-0968-5
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DOI: https://doi.org/10.1007/s10909-013-0968-5