This study was one of the first to explicitly introduce the concept of the “Scotch egg” into modern physics research. Scotch eggs are a foodstuff of sorts (with a history that is in some dispute). The study:
“The crystal structures of the elements: pseudopotential theory revisited,” J Hafner and Volker Heine [pictured here], Journal of Physics F: Metal Physics, 1983, Vol.13(12), pp. 2479-2501. The authors, at Technische Universitat Wien, Austria and the University of Cambridge, UK, report:
“…we find that the relation [defined in this paper] holds fairly well over a wide range of electron densities. Incidentally, this substantiates the ‘scotch-egg’ model of HW [Volker Heine and D. Weaire]… At constant Rc, and variable Rs, the repulsive core expands with Rs1/2 (equation (2.4)) while Rmin remains constant-the core moves over the attractive wiggle with decreasing electron density (increasing screening length). This is just the ‘scotch-egg’ behaviour.”
Here’s detail from the study:
BONUS: The song “Scotch Egg”, performed by Mr. Weebl:
BONUS: Instructables’ instructions for How to Make a Scotch Egg. Alternatively: the BBC’s instructions. Further alternatively, this video shows, laconically, the Nicko’s Kitchen method: