Weyl nodal lines, Weyl points and the tunable quantum anomalous Hall effect in two-dimensional multiferroic metal oxynitride: Tl₂NO₂

Abstract

The investigation of two-dimensional (2D) multiferroic and topological quantum phases is a significant topic in current condensed matter physics. In this study, we discover quantum topological phases in the multiferroic...

Magnetization direction-controlled topological band structure in TlTiX (X = Si, Ge) monolayers

“…Hence, achieving the QAH effect has become an exceedingly significant focal point within the realm of condensed matter physics. To date, several realistic QAH insulators have been successively predicted by theoretical calculations and confirmed by multiple experimental techniques such as angleresolved photoemission spectroscopy and electrical transport measurements [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The first observation of the QAH effect occurred in thin films of (Bi; Sb) 2 Te 3 doped with Cr at extremely low temperatures (below 30 mK) due to the weak magnetic coupling in the doped Cr atoms and the narrow band gap of the material [25].…”