Large momenta tied to large spatial dimensions, that appears in string theoretic considerations, may shed light to the existence of a minimal length scale. The coordinates in D-dimensional space no ...

Two-dimensional (2D) Dirac states have attracted tremendous research interests since the discovery of graphene and topological insulators 1,2,3,4,5. The linear dispersion and vanishing effective mass ...

The Dirac spectrum of bilayer graphene when the two layers are exactly aligned (left) shifts with a slight interlayer twist that breaks interlayer-coupling and potential symmetry, leading to a new ...

Graphene, a two-dimensional (2D) honeycomb sheet composed of carbon atoms, has attracted intense interests worldwide because of its outstanding properties and promising prospects in both basic and ...

Exceptional points (EPs) are unique types of energy-level degeneracies that occur in non-Hermitian systems. Since their existence was first proposed more than a century ago, physicists have only been ...

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