Nodal line states in electronic systems can be classified based on the order of dispersion
around a band degeneracy (ie, linear, quadratic, or cubic) and the various slopes of crossing …

Three-dimensional obstructed atomic insulators (OAIs) are characterized by the appearance
of floating surface states (FSSs) at specific surfaces. Benefiting from this feature, our study …

Unconventional quasiparticles of a twofold band degeneracy with| C|= 4, named as charge-
four Weyl point (CFWP), have been revealed in bosonic and artificial systems, while it is …

Carbon can form versatile allotropes due to its multiple bonding connections and the
prediction of new carbon structures and properties has long been a hot topic. In 1983 …

In carbon allotropes, a series of topological semi-metals have been predicted, but both novel
electronic properties and mechanical characteristics, eg, a negative Poisson's ratio (NPR) …

The distinct over-tiltings of band crossings in topological semimetals generate the type-I and
type-II classification of Dirac/Weyl and nodal-line fermions, accompanied by exotic electronic …

The nontrivial band topologies protected by certain symmetries have attracted significant
interest in condensed matter physics. The discoveries of nontrivial topological phases in real …

Carbon has many allotropes possessing unique properties. In this work, we predicted an
orthogonal carbon crystal, named ort-C24, with dynamic, mechanical and thermodynamic …

Hourglass-type Weyl fermions with the maximally topological charge of| C|= 3, namely
hourglass-type charge-three Weyl fermions (CTWFs), have seldom been reported due to the …

Recent research predicted stable two-dimensional pentagraphene in sp 2-sp 3 bonding
states and three-dimensional pentadiamond (BC14) in all-sp 3 bonding states, both …