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The Fermi Surface of Caesium
K. Okumura and I. M. Templeton
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 287, No. 1408 (Aug. 17, 1965), pp. 89-104
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/2415064
Page Count: 17
You can always find the topics here!Topics: Fermi surfaces, Signals, Magnetic fields, Crystals, Rubidium, Specimens, Experimental results, Cryostats, Cooling, Geometric planes
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A study of the de Haas-Van Alphen effect in caesium by thc pulsed field method, under carefully controlled experimental conditions, has yielded information about the orientation dependence of the Fermi surface cross-section. A computer analysis of the results m terms of cubic harmonic series has mdicated a probable radial distortion of some +3.3% in the  direction, -0.9% in the  direction, and -1.4% in the  direction; this is compared with the predictions of band structure calculations which, though indicating approximately the correct shape of Fermi surface, are appreciably m error as to the magnitude of the deviations from a sphere. The observed Fermi surface distortion is also discussed m terms of its effect on the low temperature thermoelectric power of caesium. The volume of the Fermi surface is found to be within a few tenths of 1% of that calculated from published lattice constant data. Strong variations of signal strength with orientation were observed; these have been attributed in part to the effect of spin-splitting of the Landau levels.
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences © 1965 Royal Society