Superconductivity: Materials, Mechanisms, and Technological Applications

Abstract

Superconductivity is a quantum phenomenon characterized by zero electrical resistance and the expulsion of magnetic fields (Meissner effect) below a critical temperature. Since its discovery in 1911, superconductivity has transformed our understanding of condensed matter physics and enabled advanced technological applications. This review provides a detailed examination of superconducting materials—including elemental, ceramic, and unconventional superconductors—the underlying mechanisms driving superconductivity, and the current and emerging applications in power transmission, medical imaging, quantum computing, and magnetic levitation. Comparative analysis highlights the performance parameters, critical temperatures, and operational challenges of various superconducting classes. Finally, we discuss technological hurdles and future research directions toward room-temperature superconductivity.