Topological matter

Topological matter refers to systems in which topology is required for their characterisation. This includes materials with topological defects such as skyrmions, or topologically-protected edge modes, such as topological insulators and symmetry-protected topological phases such as topological crystalline insulators and Dirac/Weyl semimetals.

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  • News & Views |

    The polar magnetic semimetal NdAlSi hosts Weyl fermions that promote helical magnetism, and defines a roadmap for future work on correlated topological matter.

    • Max Hirschberger
    •  & Yoshinori Tokura
    Nature Materials 20, 1592-1593
  • News & Views |

    Most systems exhibiting topological superconductivity are artificial structures that require precise engineering. Now, a layered material shows tantalizing signs of the phenomenon.

    • Jose L. Lado
    •  & Peter Liljeroth
  • News & Views |

    The non-collinear spin structure and nontrivial Berry curvature of Mn3Ge give rise to a long-range supercurrent in superconductor–Mn3Ge–superconductor lateral Josephson junctions.

    • Su-Yang Xu
    •  & Qiong Ma
    Nature Materials 20, 1306-1307
  • News & Views |

    Light propagating in the topological edge channel of an array of ring resonators is predicted to generate nested frequency combs: like a Matryoshka doll containing a set of smaller dolls, each ‘tooth’ of the comb comprises another frequency comb.

    • Vittorio Peano
    Nature Physics 17, 1078-1079
  • News & Views |

    Large uniaxial strain drives a sequence of topological phase transitions in the quasi-one-dimensional superconductor TaSe3, paving the way for the reversible control of surface spin currents.

    • Phil D. C. King
    Nature Materials 20, 1046-1047
  • News & Views |

    Nonlinearity and topology are both linked to symmetries, but what happens when the two are combined is not a trivial question. In a nonlinear photonic higher-order topological insulator, solitons localize on the corners together with the topological modes.

    • Grazia Salerno
    Nature Physics 17, 980-981