Superconductivity lecture notes pdf

Now imagine that we gradually increase the density. Condensed matter and qcd lectures at the university of barcelona, spain, septemberoctober 2003. Download lecture notes on superconductivity download free online book chm pdf. Our present understanding of superconductivity has arisen from a close interplay of theory and experiment. Fernandes here we will discuss a new ground state of the interacting electron gas. Foundations of low temperature physics and techniques 2. Superfluidity and superconductivity,adam hilger 1990 c. There existed no consistent microscopic theory that described. Lecture notes on superconductivity a work in progress daniel arovas congjun wu department of physics university of california, san diego june 23, 2019. Introduction to superconductivity and superfluidity. The central feature of the bcs theory is that two electrons in the superconductor are able to form a bound pair called a cooper pair if they somehow experience an attractive interaction between. Pdf lecture note on superconductivity, solid state physics. Fabrizio dolcini, superconductivity in mesoscopic systems, lecture notes for xxiii physics graddays, heidelberg.

We now know enough about superconductivity to do some modeling. Superconductivity is the set of physical properties observed in certain materials, wherein electrical resistance vanishes and from which magnetic flux fields are expelled. These notes have appeared as a result of a oneterm course in superfluidity and superconductivity given by the author to fourthyear undergraduate students and firstyear graduate students of the department of physics, moscow state university of education. Any material exhibiting these properties is a superconductor. As a result, persistent current comes into existence so that h m and all the magnetic flux lines are repelled by the superconductor as. Superconductivity by joe khachan and stephen bosi the discovery of superconductors the phenomenon of superconductivity, in which the electrical resistance of certain materials completely vanishes at low temperatures, is one of the most interesting and sophisticated in condensed matter physics. Superconductivity 2015 and t low temperature physics i. Superconductivity and low temperature physics i ws foundations of superconductivity 2. Find materials for this course in the pages linked along the left. A microscopic theory of superconductivity was developed in 1957 by john bardeen, leon cooper and j. Introduction to unconventional superconductivity in non. Lecture notes on superconductivity a work in progress.

The boulder school for condensed matter and materials physics is supported by a grant from the national science foundation, with additional funding provided by the university of colorado, jilapfc. What is a superconductor, discovery of superconductivity, meissner effect, type i superconductors, type ii superconductors, theory of superconductivity, tunneling and the josephson effect, hightemperature supercondutors and applications of superconductors. These lecture notes are an extension of my previous notes 1 presented in this lecture series and are concerned with the recently emerging research. It occurs in a wide variety of metals and alloys, below. Way more information than you ever wanted on how to fell a tree. Note however that in the formation of the individual molecules themselves the fermi statistics played no role. Superconductivity is destroyed by either raising the temperature or by applying a magnetic eld. We want to understand superconductivity using methods. Lecture notes for xxiii physics graddays, heidelberg, 59 october 2009.

Mse 5053 contemporary solid state materials in a nutshell lecture 1. Here we will discuss a new ground state of the interacting electron gas. Condensed matter and qcd lectures at the university of barcelona, spain, septemberoctober 2003 roberto casalbuoni. Lectures at the university of barcelona, spain, septemberoctober 2003. There is an energy barrier for the flux to go through the superconductor to escape time for. The thermodynamics of the associated phase transition is then elucidated. Unconventional superconductors reading superconductivity, super. Note also that in the superconductor ndfeaso1x, an example of the recent discovery of. Superconductivity refers to a complex of phenomena which are usually found to occur together.

The concept that, in a metal, a definite number of electrons per atom for instance, in the alkalis, one electron, the valence electron exist freely, rather like a gas, was developed at an early time by paul drude in. Nobel lecture, december 11, 1972 by john bardeen departments of physics and of electrical engineering university of illinois urbana, illinois introduction. This temperature is called transition temperature or critical temperature. Freely browse and use ocw materials at your own pace. For unconventional superconductivity specifically, which is a topic of active research, i would suggest notes from summer schools intense, researchfocused lecture series aimed at graduate students and postdocs. Superconductivity and low temperature physics ii thursday 12. We will discuss these basic experiments in the following chapter, but mainly this course is dealing with the theory of superconductivity. Superconductivity and low temperature physics i foundations of superconductivity 2. The course is based on steven simons oxford solid state basics textbook. Superconductivity and bcs theory introduction electronphonon interaction, cooper pairs bcs wave function, energy gap and quasiparticle states predictions of the bcs theory limits of the bcs gap equation.

However, these are just the notes of a oneterm twohours lecture to introduce into the spirit of this kind of theoretical approach, not only addressing theorists. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Discovery of superconductivity meissner effect type i superconductors type ii superconductors theory of superconductivity tunneling and the josephson effect hightemperature superconductors. In our days of lively speculations on possible causes of superconductivity it should provide the newcommer to the. Lectures on superconductivity richard hlubina comenius university, bratislava, slovakia contents 1 basic notions 2 2 ginzburglandau theory 7 3 magnetic properties of type i superconductors 11 4 magnetic properties of type ii superconductors 14 5 pairing instability 19 6 bcs theory 23 7 spectroscopy of the superconducting state 28 8 josephson. In this macroscopic quantum state, the electrons form.

Robert schrieffer, which is known as the bcs theory. Lecture notes applied superconductivity electrical. Upperlevel undergraduate course taught at the university of pittsburgh in the fall 2015 semester by sergey frolov. Chapter 3 coherent current states in twoband superconductors 37. The meissner e ect, persistent currents and the josephson e ects mit department of physics dated. The video lectures can be watched free of charge online. Physics 241 superconductivity questions and answers. Superconductivity applications of quantum mechanics.

Department of physics of the university of florence, via g. The goal was not to give a detailed picture of these two macroscopic quantum phenomena with an extensive coverage of the experimental. Superconductivity property of complete disappearance of electrical resistance in solids when they are cooled below a characteristic temperature. Lecture note on superconductivity, solid state physics. Jorge quintanilla magnetism and superconductivity ph752 1 about this course we will have 28 lectures, roughly split as 14 on magnetism and 14 on superconductivit. Physics 241 superconductivity questions and answers q1.

Lets imagine a device consisting of two superconductors separated by a thin oxide tunnel barrier, and no electromagnetic fields. We know that electric charge transport in metals takes place through the electrons. The transition to the superconducting state of several bulk samples. Superconductivity was discovered by kamerlinghonnes in 1911, when he was studying the transport properties of hg mercury at low temperatures. A series of films prepared by bartek glowacki to introduce undergraduate and postgraduate students to superconductivity and its applications, including interviews with leading experts from academia and industry. Lecture notes on superconductivity florence theoretical physics. The course note begins with a description of the changes in the properties of metals on becoming superconducting. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered even down to near absolute zero, a superconductor has a. Lecture 23 superconductivity ii theory 4 physics 460 f 2000 lect 23 19 persistent currents how can the current stop flowing. Mahan 6 fundamentals of superconductivity by vladimir z. The temperature at which the transition took place was called the critical temperature tc. Superconductivity is observed in a large variety of materials but, remarkably, not in some of the best normal conductors like. He found that below the liquifying temperature of helium, ataround4. What are some good lecture notes on superconductivity.

Introduction superconductivity discovered in 1911 by onnes 9, is the quantum phenomena that certain materials exhibit under particular magnetic and temperature regimes. March 1, 2019 several phenomena associated with superconductivity are observed in three experiments carried out in a liquid helium cryostat. Superconductivity is characterized by a vanishing static electrical resistivity and an expulsion of the magnetic. Applied superconductivity lecture notes pdf 35p this note covers the following topics. Unit v superconductivity engineering physics when the super conducting ring temperature cooled less than of it s critical temperature, it obeys meissner effect.