Subgap in the surface bound states spectrum of Superfluid $^3$He-B with Rough Surface
| Autor: | Katsuhiko Nagai, Yasushi Nagato, Seiji Higashitani |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Level repulsion Condensed matter physics Spin polarization Condensed Matter - Superconductivity FOS: Physical sciences Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas Magnetic field Superfluidity Superconductivity (cond-mat.supr-con) 0103 physical sciences Bound state Surface roughness Density of states General Materials Science 010306 general physics Majorana fermion |
| DOI: | 10.48550/arxiv.1711.01056 |
| Popis: | The subgap structure in the surface bound states spectrum of superfluid $$^3$$ He-B with rough surface is discussed. The subgap is formed by the level repulsion between the surface bound state and the continuum states in the course of multiple scattering by the surface roughness. We show that the level repulsion is originated from the nature of the wave function of the surface bound state that is now recognized as Majorana fermion. We study the superfluid $$^3$$ He-B with a rough surface and in a magnetic field perpendicular to the surface using the quasi-classical Green function together with a random S-matrix model. We calculate the self-consistent order parameters, the spin polarization density and the surface density of states. It is shown that the subgap is found also in a magnetic field perpendicular to the surface. The magnetic field dependence of the transverse acoustic impedance is also discussed. |
| Databáze: | OpenAIRE |
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