منابع مشابه
Topological Majorana and Dirac zero modes in superconducting vortex cores.
We provide an argument based on flux insertion to show that certain superconductors with a nontrivial topological invariant have protected zero modes in their vortex cores. This argument has the flavor of a two-dimensional index theorem and applies to disordered systems as well. It also provides a new way of understanding the zero modes in the vortex cores of a spinless px+ipy superconductor. A...
متن کاملTopological Superconductivity in Dirac Semimetals.
Dirac semimetals host bulk band-touching Dirac points and a surface Fermi loop. We develop a theory of superconducting Dirac semimetals. Establishing a relation between the Dirac points and the surface Fermi loop, we clarify how the nontrivial topology of Dirac semimetals affects their superconducting state. We note that the unique orbital texture of Dirac points and a structural phase transiti...
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Plexcitons are polaritonic modes that result from the strong coupling between excitons and plasmons. Here, we consider plexcitons emerging from the interaction of excitons in an organic molecular layer with surface plasmons in a metallic film. We predict the emergence of Dirac cones in the two-dimensional band-structure of plexcitons due to the inherent alignment of the excitonic transitions in...
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In electronic topological Dirac semimetals (DSMs) the conduction and valence bands touch at discrete points in the Brillouin zone and formDirac cones. They are robust against spin–orbit interaction (SOI) and protected by crystal symmetries. They can be driven to different topological phases by breaking the symmetries. In the low-temperature quantummagnetic systems themagnon dispersions have sim...
متن کاملThe topological characteristics of lattice Dirac operators
We formulate the topological characteristics of lattice Dirac operators in the context of the index and the chiral anomaly, and illustrate this concept by explicit examples. PACS numbers: 11.15.Ha, 11.30.Rd, 11.30.Fs In continuum, the Dirac operator of massless fermions in a smooth background gauge field with nonzero topological charge Q has zero eigenvalues and the corresponding eigenfunctions...
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ژورنال
عنوان ژورنال: Nature Nanotechnology
سال: 2020
ISSN: 1748-3387,1748-3395
DOI: 10.1038/s41565-020-0773-7