Investigations on M′-M″xene as topological insulator

Mxenes are 2D inorganic compounds of transition metal carbides, nitrides, or carbonitrides with few atom thickness. These compounds are exploited for industrial, biomedical, electronic and energy storage devices. Due to their large spin orbit coupling (SOC) and Dirac like band at Fermi level, it is predicted that M′-M″xene (M′ and M″ are transition metals) can be used as Topological Insulator. Topological insulator is a new state of matter with insulating in bulk and superconducting in surface or edge state. We reviewed different theoretical models, material properties and experimental results of Topological Insulators in 2D and 3D phases. Surface electrons in Topological Insulator are superconducting due to absence of their backscattering. So, Mxene can be used in spintronic devices, transistors without dissipation for quantum computers based on Quantum Spin Hall Effect (QSHE) and Quantum Anamolous Hall Effect (QAHE) and other applications on advanced magneto electronic and optoelectronic devices as topological insulator