Topological Materials - C. Shekhar
Topological materials have newly been identified as quantum materials and their properties are highlighted by topology. Topology is a branch of mathematics where properties of objects that are invariant under smooth deformations are studied. Materials properties which are invariant under topological transformations property are known as topological materials. Topological insulators (TIs) are insulating in bulk and conducting at surface. In another class of topological materials, the bulk of the material is semimetal and their valence and conduction bands touch at near Fermi level. Depending on whether the bands are nondegenerate or doubly degenerate, topological material is called a topological Weyl semimetal or a topological Dirac semimetal. Properties of topological materials indicate the existence of Majorana, Weyl and Dirac fermions. Many of the compounds containing chalchogens and pnictogens have shown exotic properties e.g. FeAs-based high temperature superconductors, topological insulators, Weyl and Dirac semimetals, graphene analogues (transition metals chalcogenides) etc.
Our group expertise in single crystal growth and transport measurements achieves synergy to realize new properties of materials by theoretical collaborations. We also welcome worldwide collaborations having similar or different thoughts and interests.