Two-nodal surface phonons in solid-state materials

Detail computational study about the structural, electronic, optical, and mechanical properties of RbVX3 (Cl, Br, I) halide perovskite materials

“…The phonon study of any material is essential because phonons are known as the main factor of the thermal characteristics of any material and their dynamic behavior. 26,27 In the present study of the RbVCl 3 , RbVBr 3 , and RbVI 3 compounds, the dispersion band structures of phonon were examined with the help of the WIEN2K package, and their results are presented in Fig. 3.…”

Complex nodal structure phonons formed by open and closed nodal lines in CoAsS and Na2CuP solids

“…29 Compared to the large number of studies in the field of twodimensional (2D) and three-dimensional (3D) topological electronic materials, the research concerning 3D topological phononic materials has only been initiated in the past few years. Roughly, the topological phonons in 3D solids can be divided into nodal point phonons, [36][37][38][39][40][41][42][43][44][45] nodal line phonons, [46][47][48][49][50][51][52][53][54][55][56][57][58] and nodal surface phonons, [59][60][61][62] respectively, corresponding to zerodimensional (0D), one-dimensional (1D), and 2D phonon band degeneracies in the 3D Brillouin zone (BZ). Note that the types of nodal line phonons are more diverse than those of nodal points and nodal surface phonons.…”

Cubic Ca3I3P with ideal charge-two triple point

“…The current study of crystal topology has even been further extended to bosons, including phonons, photons, and magnons. Phonons [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] can be a perfect platform for realizing these quasiparticles owing to their unique device applications and the advantages of whole frequency range observation. For example, in the phonon dispersion of three-dimensional-SiO 2 , Wang et al [40] proposed a topological triangular Weyl complex made up of one double Weyl point and two single Weyl points.…”