FMI036 - Superconductivity and low-temperature physics
|Supraledning och lågtemperaturfysik
| Syllabus adopted 2019-02-19 by Head of Programme (or corresponding)
|Grading: TH - Five, Four, Three, Fail
|Education cycle: Second-cycle
Major subject: Engineering Physics
Department: 59 - MICROTECHNOLOGY AND NANOSCIENCE
Teaching language: English
Application code: 18114
Open for exchange students: Yes
Maximum participants: 40
18 Mar 2020 pm SB
10 Jun 2020 am J,
20 Aug 2020 pm J
MPNAT NANOTECHNOLOGY, MSC PROGR, Year 1 (compulsory elective)
Go to Course Homepage
In order to be eligible for a second cycle course the applicant needs to fulfil the general and specific entry requirements of the programme that owns the course. (If the second cycle course is owned by a first cycle programme, second cycle entry requirements apply.)
Exemption from the eligibility requirement:
Applicants enrolled in a programme at Chalmers where the course is included in the study programme are exempted from fulfilling these requirements.
Course specific prerequisites
A basic course in quantum mechanics (i.e. FUF040), and a basic course in solid state physics/electronics (i.e. FFY011).
Physical phenomena are
often studied at low temperature, particularly within condensed matter
physics. Coherence effects become dominating. The course contents are
concentrated to a few sub-fields: 1. studies of superconductors (about
half the time), both an understanding of superconductivity starting from
microscopic properties and of macroscopic quantum effects, particularly
the Josephson effects; 2. properties of superfluid helium and
Bose-Einstein condensates, i.e. of macroscopic quantum fluids; 3. low
temperature techniques, i.e. a summary of different cooling methods,
thermal properties of materials, thermometry, etc. The course is
suitable for those that want to continue doing research in Physics.
Learning outcomes (after completion of the course the student should be able to)
Explain the basic properties of both high Tc and low Tc superconductors.
Apply Londons equations to superconductors to explain their electromagnetic properties.
Describe thermodynamic properties of superconductors. With the help of Ginzburg Landau theory describe different lengthscales such as the penetration depth and the coherence length, and explain the differences between type I and type II superconductors.
Account for the basic ideas of the BCS theory, like Cooper-pairing, energy gap and the density of states for excitations.
Describe the phase diagrams for both helium-3 and helium-4.
Describe how Bose-Einstein condensation comes about.
Describe superfluid phenomena such as, rollin film, the fountain effect and second sound.
Describe different cooling methods which are used both above and below 1 Kelvin.
Explain physical properties of different materials at low temperature.
The course may be considered as an application of courses in quantum physics, solid state physics, electrodynamics and thermodynamics.
The course has three parts:
Basic properties of superconductors, thermodynamics, superconductors in magnetic fields
The London equations, electromagnetic properties, penetration depth
Ginzburg-Landau theory, coherence length, type I and type II superconductors
BCS theory, second quantization, Cooper-pairing, energy gap
Tunneling, Josephson effects and SIS tunneling
High Tc superconductors, structure, d-wave symmetry, phase diagram,
Overview of applications, squids, microwave devices, power applications
Properties of liquid helium-4, the phase diagram, superfluidity
Superfluid phenomena, rollin film, fountain effect, second sound
Exitations and vortecies in superfluids
Properties of liquid helium-3, the phase diagra, superfluidity
Symmetry properties of superfluid helium-3
Themal and electrical properties for different materials at low temperature
Cooling methods above 1K, Joule-Tomphson, Gifford-McMahon, evaporation cooling
Liquefication of helium
Cooling methods below 1K, dilution refrigeration, adiabatic demagnetisation, Pomerantchuck cooling
The course embraces lectures (about 32 hours), two laborations (Josephson effect, and superfluid helium)and home exercises.
J.R. Waldram: Superconductivity of metals and cuprates
(Institute of Physics Publ., Bristol, 1996, pbk)
Examination including compulsory elements
The course ends with a written exam. There is a laboratory part that must be taken.