Department of Physics, Unit Catalogue 2011/12
|Level:||Honours (FHEQ level 6)|
|Supplementary Assessment:||Mandatory extra work (where allowed by programme regulations)|
|Requisites:||Before taking this unit you must (take PH20017 or take PH20063) and take PH20019 and take PH20020 and (take PH20029 or take PH20067)|
The aims of this unit are to introduce areas of condensed matter physics that extend beyond the conventional domain of regular, infinite, crystalline solids.
After taking this unit the student should be able to:
* relate the electronic, optical and mechanical properties of real crystals to their defects;
* make quantitative estimates of the parameters that govern the behaviour of real solids;
* describe the structure and properties of amorphous solids;
* describe, compare and contrast experimental probes of solid surfaces;
* describe the structure, phase behaviour, and diffusive properties of polymers, colloids and liquid crystals;
* describe the principal structural and relaxational properties of solid, liquid, and soft matter glasses in terms of simple models.
Numeracy T/F A, Problem Solving T/F A.
Real solids (3 hours): Defects in crystals; point defects and dislocations in crystals. Effect on electronic, optical and mechanical properties. Point defects in thermal equilibrium. Self diffusion. Ionic conductivity. Colour centres.
Surface physics (6 hours): Clean and real surfaces, UHV, epitaxial growth. Surface energy; nearest neighbour bond model. Surface nets and unit meshes, reconstructions, adsorbates, the work function. Auger, UV and X-ray photoelectron spectroscopy. Reciprocal nets and diffraction. LEED, the scanning tunnelling and atomic force microscopes.
Introduction to amorphous solids (3 hours): Topological disorder. Determination of glass structure. Short range order, vibrational states and thermal conductivity of glasses.
Soft condensed matter (10 hours): Polymers; chemical structure. Models for the conformations of polymers; the random walk, large N limit, freely jointed chains, Gaussian chains. Polymer solutions and melts. Colloids; colloid structure, Brownian motion, sedimentation. Interacting colloid particles, phase behaviour, crystals and glasses. Liquid Crystals; phase behaviour, optical properties. Soft matter glasses; phenomenology, simple models of the glass transition.
PH30028 is Optional on the following programmes:Department of Mathematical Sciences