MIT News  May 19, 2022
The recently introduced theories of topological quantum chemistry and symmetry-based indicators (SIs) have facilitated the discovery of topological phases of matter and large-scale searches for materials with experimentally accessible topological properties at the Fermi energy (EF). Away from EF, energetically isolated bands and topological gaps are also useful in numerous experimental settings; they can be accessed via (electro)chemical doping, electrostatic gating, hydrostatic pressure, and nonequilibrium photoexcitation and are relevant to Floquet engineering and nonlinear optical experiments. An international team of researchers (Spain, USA – MIT, Princeton University, Germany) has completed a catalog of stable and fragile topology in all the bands and bandgaps both at and away from EF in the materials contained in the Inorganic Crystal Structure Database (ICSD). Their results are publicly accessible through a substantial upgrade of the Topological Materials Database https://topologicalquantumchemistry.com/ …read more. TECHNICAL ARTICLEÂ
Topological materials statistics and repeat-topological surface states. Credit: SCIENCE, 20 May 2022, Vol 376, Issue 6595