Three-dimensional (3D) topological Dirac semimetal has a linear energy dispersion in 3D momentum space, and it can be viewed as an analogue of graphene. Extensive efforts have been devoted to the understanding of bulk materials, but yet it remains a challenge to explore the intriguing physics in low-dimensional Dirac semimetals. Here, we report on the synthesis of Cd3As2 nanowires and nanobelts...

It has recently been demonstrated that it is possible to open a gap in magnetic Weyl semimetal, while preserving the chiral anomaly along with charge conservation and translational symmetries, which all protect gapless nodes weakly interacting semimetal. The resulting state was shown be nontrivial generalization of nonabelian fractional quantum Hall liquid three dimensions. Here we point out se...

We propose to realize Dirac states in an inclined two-dimensional Su-Schrieffer-Heeger model on a square lattice. show that pair of points protected by space-time inversion symmetry appear the semimetal phase. The locations these are not pinned any high-symmetry Brillouin zone but tunable through parameter modulations. Interestingly, merging two undergoes topological phase transition leads eith...

We study the effect of disorder on space-time supersymmetry that is proposed to emerge at quantum critical point pair density wave transition in $(2+1)$-dimensional (D) Dirac semimetals and $(3+1)$D Weyl semimetals. In $(2+1)$D semimetal, we consider three types disorder, including random scalar potential, vector potential mass whereas absent semimetal. Via a systematic renormalization-group an...

Interplay between magnetism and electronic band topology is of central current interest in topological matter research. We use quantum oscillations as powerful tool to probe the evolution Dirac semimetal EuMnSb$_2$. The Eu local 4f magnetic moments display different antiferromagnetic states below 25 K a field-polarized phase above 16 T. Upon cooling from 65 into state, an exotic temperature dep...