Fisica | SUPERCONDUCTIVITY

cod. 0522600031

SUPERCONDUCTIVITY

	0522600031
	DIPARTIMENTO DI FISICA "E.R. CAIANIELLO"
	EQF7
	PHYSICS
	2017/2018

PERCORSO COMUNE

	YEAR OF COURSE 1
	YEAR OF DIDACTIC SYSTEM 2017
	PRIMO SEMESTRE

TEACHING UNITS

	SSD	CFU	HOURS	ACTIVITY	TYPE OF ACTIVITY
	FIS/03	6	48	LESSONS	SUPPLEMENTARY COMPULSORY SUBJECTS

	Objectives
	KNOWLEDGE AND UNDERSTANDING: THE COURSE AIMS TO PROVIDE A PHENOMENOLOGICAL, CRITICAL DESCRIPTION OF THE BEHAVIOR OF SUPERCONDUCTING MATERIALS AND SUPERCONDUCTING DEVICES, AS WELL AS OF THEIR MOST RELEVANT APPLICATIONS. APPLYING KNOWLEDGE AND UNDERSTANDING: THE COURSE WILL TEND TO DEVELOP STUDENT'S ABILITY TO EXPOSE CLEARLY THE ACQUIRED KNOWLEDGE, ALSO BY WRITING SHORT RELATED REPORTS.

	Prerequisites
	GOOD KNOWLEDGE OF ELECTROMAGNETISM IN MATTER; KNOWLEDGE OF BASIC ELEMENTS OF QUANTUM MECHANICS AND ITS APPLICATION TO THE STRUCTURE OF MATTER AND TO THE SOLID STATE PHYSICS.

	Contents
	PHENOMENOLOGICAL INTRODUCTION: TRANSITION TEMPERATURE, THE ISOTOPE EFFECT, SHIELDING AND MEISSNER EFFECTS, IMPURITIES EFFECT, CRITICAL FIELDS, I- AND II-KIND SUPERCONDUCTORS, CRITICAL CURRENT, SURFACE IMPEDENCE, SPECIFIC HEAT, THERMAL CONDUCTIVITY, ENERGY GAP. PHENOMENOLOGICAL MODELS: TWO-FLUID MODEL, THERMODYNAMIC POTENTIAL FOR MAGNETIC SYSTEMS, THERMODYNAMIC CRITICAL FIELD, LONDON EQUATIONS, PENETRATION LENGTH, THERMODYNAMICAL CLASSIFICATION OF THE PHASE TRANSITIONS, LANDAU THEORY OF SECOND-ORDER PHASE TRANSITIONS, ORDER PARAMETER, THERMODYNAMIC POTENTIAL, EQUILIBRIUM STATES, LIMITS OF THE THEORY. THERMODYNAMIC POTENTIAL FOR A SUPERCONDUCTOR IN AN EXTERNAL MAGNETIC FIELD, GINZBURG-LANDAU EQUATIONS, PENETRATION LENGTH AND COHERENCE LENGTH, STRUCTURE OF AN ISOLATED VORTEX LINE, CRITICAL FIELDS, ABRIKOSOV LATTICE. TRANSPORT AND MAGNETIC PROPERTIES IN PRESENCE OF IMPURITIES: CRITICAL CURRENT, CRITICAL STATE, MAGNETIZATION CURVES, D.C AND A.C. MAGNETIC SUSCEPTIBILITY, FLUX CREEP, FLUX FLOW, VORTEX DYNAMICS IN UNCONVENTIONAL SUPERCONDUCTORS, SHORT DESCRIPTION OF POWER APPLICATIONS. OVERVIEW OF MICROSCOPIC THEORY: COOPER PAIRS AND BCS GROUND STATE, THE EXCITATION SPECTRUM, ENERGY GAP, DENSITY OF STATES AND SEMICONDUCTOR MODEL, LIMITATIONS OF THE BCS THEORY. TUNNEL JUNCTIONS: TUNNELING CURRENT BETWEEN NORMAL METALS, SUPERCONDUCTING TUNNEL BETWEEN QUASIPARTICLES, TUNNEL PAIRS AND JOSEPHSON EFFECT, FEYNMAN MODEL, DC AND AC JOSEPHSON EFFECT, RSJ MODEL, MEASUREMENT OF E/H, STANDARD VOLTAGE, MAGNETIC FIELD DEPENDENCE OF THE MAXIMUM JOSEPHSON CURRENT, INTERFEROMETERS, SQUID. OVERVIEW OF MANUFACTURING TECHNIQUES: OPTICAL PHOTOLITHOGRAPHY AND ELECTRON MICROSCOPY. OVERVIEW OF APPLICATIONS IN MEDICINE, GEOPHYSICS, METROLOGY

PHENOMENOLOGICAL INTRODUCTION:
TRANSITION TEMPERATURE, THE ISOTOPE EFFECT, SHIELDING AND MEISSNER EFFECTS, IMPURITIES EFFECT, CRITICAL FIELDS, I- AND II-KIND SUPERCONDUCTORS, CRITICAL CURRENT, SURFACE IMPEDENCE, SPECIFIC HEAT, THERMAL CONDUCTIVITY, ENERGY GAP.

PHENOMENOLOGICAL MODELS:
TWO-FLUID MODEL, THERMODYNAMIC POTENTIAL FOR MAGNETIC SYSTEMS, THERMODYNAMIC CRITICAL FIELD, LONDON EQUATIONS, PENETRATION LENGTH, THERMODYNAMICAL CLASSIFICATION OF THE PHASE TRANSITIONS, LANDAU THEORY OF SECOND-ORDER PHASE TRANSITIONS, ORDER PARAMETER, THERMODYNAMIC POTENTIAL, EQUILIBRIUM STATES, LIMITS OF THE THEORY. THERMODYNAMIC POTENTIAL FOR A SUPERCONDUCTOR IN AN EXTERNAL MAGNETIC FIELD, GINZBURG-LANDAU EQUATIONS, PENETRATION LENGTH AND COHERENCE LENGTH, STRUCTURE OF AN ISOLATED VORTEX LINE, CRITICAL FIELDS, ABRIKOSOV LATTICE.

TRANSPORT AND MAGNETIC PROPERTIES IN PRESENCE OF IMPURITIES:
CRITICAL CURRENT, CRITICAL STATE, MAGNETIZATION CURVES, D.C AND A.C. MAGNETIC SUSCEPTIBILITY, FLUX CREEP, FLUX FLOW, VORTEX DYNAMICS IN UNCONVENTIONAL SUPERCONDUCTORS, SHORT DESCRIPTION OF POWER APPLICATIONS.

OVERVIEW OF MICROSCOPIC THEORY:
COOPER PAIRS AND BCS GROUND STATE, THE EXCITATION SPECTRUM, ENERGY GAP, DENSITY OF STATES AND SEMICONDUCTOR MODEL, LIMITATIONS OF THE BCS THEORY.

TUNNEL JUNCTIONS:
TUNNELING CURRENT BETWEEN NORMAL METALS, SUPERCONDUCTING TUNNEL BETWEEN QUASIPARTICLES, TUNNEL PAIRS AND JOSEPHSON EFFECT, FEYNMAN MODEL, DC AND AC JOSEPHSON EFFECT, RSJ MODEL, MEASUREMENT OF E/H, STANDARD VOLTAGE, MAGNETIC FIELD DEPENDENCE OF THE MAXIMUM JOSEPHSON CURRENT, INTERFEROMETERS, SQUID.

OVERVIEW OF MANUFACTURING TECHNIQUES:
OPTICAL PHOTOLITHOGRAPHY AND ELECTRON MICROSCOPY.

OVERVIEW OF APPLICATIONS IN MEDICINE, GEOPHYSICS, METROLOGY

	Teaching Methods
	LECTURES AND SEMINARS

	Verification of learning
	THE VERIFICATION OF THE ACQUISITION OF KNOWLEDGE ON THE PHENOMENOLOGY AND THE PHENOMENOLOGICAL THEORIES OF SUPERCONDUCTING MATERIALS IS CARRIED OUT THROUGH THE ANALYSIS OF A WORK WRITTEN BY THE STUDENT THROUGH WHICH THE ABILITY TO PRESENT THE ACQUIRED KNOWLEDGE IS ALSO VERIFIED

	Texts
	P.G. DE GENNES: “SUPERCONDUCTIVITY OF METALS AND ALLOYS”, BENJAMIN L.D. LANDAU, E.M. LIFSHITS “FISICA STATISTICA”, EDITORI RIUNITI M. TINKHAM: “INTRODUCTION TO SUPERCONDUCTIVITY”, MC GRAW-HILL A. BARONE, G. PATERNÒ: "PHYSICS AND APPLICATIONS OF THE JOSEPHSON EFFECT", J. WILEY & SONS L. SOLIMAR: "SUPERCONDUCTING TUNNELING AND APPLICATIONS", CHAPMANN AND HALL OTHER: NOTES, SLIDES, STUDENTS' REPORTS OF PREVIOUS YEARS

Texts

P.G. DE GENNES: “SUPERCONDUCTIVITY OF METALS AND ALLOYS”, BENJAMIN
L.D. LANDAU, E.M. LIFSHITS “FISICA STATISTICA”, EDITORI RIUNITI
M. TINKHAM: “INTRODUCTION TO SUPERCONDUCTIVITY”, MC GRAW-HILL
A. BARONE, G. PATERNÒ: "PHYSICS AND APPLICATIONS OF THE JOSEPHSON EFFECT", J. WILEY & SONS
L. SOLIMAR: "SUPERCONDUCTING TUNNELING AND APPLICATIONS", CHAPMANN AND HALL

OTHER: NOTES, SLIDES, STUDENTS' REPORTS OF PREVIOUS YEARS