“School of Nano-Sciences”

Back to Papers Home
Back to Papers of School of Nano-Sciences

Paper   IPM / Nano-Sciences / 16207
School of Nano Science
  Title:   Topological phases in α-Li3N-type crystal structure of light-element compounds
1.  Ali Ebrahimian
2.  Reza Asgari
  Status:   Published
  Journal: Phys. Rev. B
  Vol.:  102
  Year:  2020
  Pages:   165119
  Publisher(s):   American Physical Society
  Supported by:  IPM
Materials with tunable topological features, simple crystal structure and flexible synthesis, are in extraordinary demand towards technological exploitation of unique properties of topological nodal points. The controlled design of the lattice geometry of light elements is determined by utilizing density functional theory and the effective Hamiltonian model together with the symmetry analysis. This provides an intriguing venue for reasonably achieving various distinct types of novel fermions. We, therefore, show that a nodal line (type-I and II), Dirac fermion, and triple point (TP) fermionic excitation can potentially appear as a direct result of a band inversion in group-I nitrides with α-Li3N-type crystal structure. The imposed strain is exclusively significant for these compounds, and it invariably leads to the considerable modification of the nodal line type. Most importantly, a type-II nodal loop can be instantly realized in the system under strain. These unique characteristics make α-Li3 N-type crystal structure an ideal playground to achieve various types of novel fermions well-suited for technological applications.

Download TeX format
back to top
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
scroll left or right