Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.235304
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Funding
- EPSRC [EP/C522877/1, EP/E0541129/1, EP/J022004/1]
- NSF [DMR-1202991]
- European Microkelvin Consortium [228464]
- Engineering and Physical Sciences Research Council [EP/J022004/1, EP/C522877/1, EP/E054129/1] Funding Source: researchfish
- EPSRC [EP/E054129/1, EP/J022004/1] Funding Source: UKRI
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1202991] Funding Source: National Science Foundation
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The B phase of superfluid He-3 is a three-dimensional time-reversal invariant topological superfluid, predicted to support gapless Majorana surface states. We confine superfluid He-3 into a thin nanofluidic slab geometry. In the presence of a weak symmetry-breaking magnetic field, we have observed two possible states of the confined He-3-B phase manifold, through the small tipping angle NMR response. Large tipping angle nonlinear NMR has allowed the identification of the order parameter of these states and enabled a measurement of the surface-induced gap distortion. The results for two different quasiparticle surface scattering boundary conditions are compared with the predictions of weak-coupling quasiclassical theory. We identify a textural domain wall between the two B phase states, the edge of which at the cavity surface is predicted to host gapless states, protected in the magnetic field.
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