SUPERCONDUCTIVITY. PHENOMENA, LONDON THEORY. London theory. Gauge symmetry, London gauge. THE THERMODYNAMICS OF THE PHASE TRANSITION. THE GINSBURG-LANDAU THEORY; TYPES OF SUPERCONDUCTORS. INTERMEDIATE STATE, MIXED STATE. JOSEPHSON EFFECTS. MICROSCOPIC THEORY: THE FOCK SPACE. MICROSCOPIC THEORY: THE BCS MODEL. MICROSCOPIC THEORY: PAIR STATES. MICROSCOPIC THEORY: COHERENCE FACTORS
