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- Title
Nonlinear Transport of Positive Ions Below a Free Surface of Topological Superfluid $$^3$$ He-B.
- Authors
Ikegami, H.; Kono, K.
- Abstract
The B phase of the topological superfluid $$^3$$ He ( $$^3$$ He-B) shows many exotic phenomena at a surface as well as in bulk. In this article, we describe the first study of the nonlinear transport behavior of positive ions trapped below a free surface of $$^3$$ He-B measured at very low temperatures (below 300 $${\upmu }$$ K), investigated for the purposes of observing the Landau critical velocity for pair breaking and finding a signature of the Majorana surface Andreev bound states. We observe that nonlinearity sets in at a velocity smaller than the Landau critical velocity for bulk pair breaking, and find that the nonlinear behavior does not depend on the depth of the trapped ions even though the depth is varied over the coherence length. The lack of depth dependence indicates that the nonlinear behavior does not reflect properties of the surface Andreev bound states. The onset of the nonlinearity at a velocity smaller than the bulk pair breaking velocity might be due to the inelastic scattering of bulk quasiparticles.
- Subjects
NONLINEAR theories; CATIONS; FREE surfaces (Crystallography); SUPERFLUIDITY; HELIUM; SURFACES (Physics); INELASTIC scattering
- Publication
Journal of Low Temperature Physics, 2014, Vol 175, Issue 5/6, p718
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-014-1155-z