We propose the surface of topological superconductors as a platform for
realizing two-dimensional flat bands, where electron interactions play a
crucial role. The surface flat bands originate from topological features
supported by two key mechanisms: (1) a trivial Chern number prevents the
zero-energy states from merging into the continuum of the bulk spectrum,
thereby ensuring their confinement within the superconducting gap; and (2) weak
spin conservation allows the gap function to exhibit phase winding. As a
consequence, the surface exhibits a remarkably high density of states at nearly
zero energy. Such surface states are likely to be realized in the candidate
topological superconductor UTe$_2$. Our results provide important insights into
the interpretation of recent Josephson STM experiments on UTe$_2$.

Este artículo explora los viajes en el tiempo y sus implicaciones.

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