De Haas-van Alphen effect
- De Haas-van Alphen effect
The de Haas–van Alphen effect, often abbreviated to dHvA, was discovered in 1930 by Wander Johannes de Haas and PM van Alphen.
The dHvA effect is a quantum mechanical effect in which certain physical quantities of a pure metal crystal oscillate as the intensity of an applied magnetic field is increased. Examples of such physical quantities include resistivity, specific heat, and sound attenuation. [cite web
url=http://phy.ntnu.edu.tw/~changmc/Teach/SS/SSG_note/grad_chap14.pdf
title=Measuring FS using the de Haas-van Alphen effect] [cite journal
doi=10.1103/PhysRevB.8.2649
title=de Haas-van Alphen Effect and the Specific Heat of an Electron Gas
year=1973
author=Holstein, T.
journal=Physical Review B
volume=8
pages=2649]
This effect is due to Landau quantization of electron energy in an applied magnetic field. A strong magnetic field — typically several teslas — and a low temperature are required to cause a material to exhibit the dHvA effect. [cite web
url=http://www.lanl.gov/orgs/mpa/nhmfl/users/pages/deHaas.htm
title=de Haas-van Alphen Effect
author=Neil Harrison
publisher=National High Magnetic Field Laboratory at the Los Alamos National Laboratory]
The dHvA effect has been studied in the context of a two-dimensional gas.
This effect can be used to study the extremal cross section of the Fermi surface of a metal.
References
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