The Influence of Strong Magnetic Fields on Superconductivity

Abstract

The interplay between strong magnetic fields and superconductivity has been a cornerstone of condensed matter physics, revealing insights into quantum coherence, vortex dynamics, and phase transitions. This article reviews the fundamental mechanisms by which external magnetic fields affect the superconducting state, including orbital and Pauli pair-breaking effects. The response of both conventional (type I and type II) and unconventional superconductors is examined, highlighting critical field limits, vortex lattice structures, and the quantum limit of superconductivity. Special attention is given to high-temperature superconductors and emergent topological superconductors in extreme fields. The implications of these phenomena are far-reaching, impacting magnet-based technologies, quantum devices, and our understanding of correlated quantum states.