Honeycomb layered oxides: structure, energy storage, transport, topology and relevant insights

The advent of nanotechnology has hurtled the discovery and development nanostructured materials with stellar chemical physical functionalities in a bid to address issues energy, environment, telecommunications healthcare. In this quest, class two-dimensional layered consisting alkali or coinage metal atoms sandwiched between slabs exclusively made transition chalcogen (or pnictogen) arranged honeycomb fashion have emerged as exhibiting fascinatingly rich crystal chemistry, high-voltage electrochemistry, fast cation diffusion besides playing host varied exotic electromagnetic topological phenomena. Currently, niche application energy storage materials, oxides serves ideal pedagogical exemplars innumerable capabilities nanomaterials drawing immense interest multiple fields ranging from science, solid-state electrochemistry condensed matter physics. review, we delineate relevant chemistry physics oxides, discuss their for tunable superfast ionic conduction, electromagnetism topology. Moreover, elucidate unexplored albeit vastly promising space whilst outlining effective ways identify regions within compositional space, particularly where interesting properties could be lurking aforementioned coinage-metal oxide structures. We conclude by pointing towards possible future research directions, prospective realisation Kitaev-Heisenberg-Dzyaloshinskii-Moriya interactions single crystals Floquet theory closely-related materials.