The idea of superlattice has important applications in magnetic,optical,and semiconductor fields.Since the rise of graphene,it is natural to extend the conventi
The assignment of the chiral indexes,(n,m) to a single walled carbon nanotubes (SWCNT ) during its initial on catalyst surface stage has been a long term myster
The Ti50Rh50 compound was found to have two-stage transformations:The high temperature transformation from the cubic structure into tetragonal distorted B2 was
We study the electronic structures of oxygen-deficient Ta2O5 by using first-principles calculations.Starting from the stable structure determined experimentally
Three-dimensional (3D) Dirac point,where two Weyl points overlap in momentum space,is usually unstable and hard to realize.Here we show,based on the first-princ