Effect of high pressure on the Fermi surfaces of zinc and aluminum
Melz, Peter John
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/25054
Description
Title
Effect of high pressure on the Fermi surfaces of zinc and aluminum
Author(s)
Melz, Peter John
Issue Date
1966
Doctoral Committee Chair(s)
Lazarus, David
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Fermi surfaces
zinc
aluminum
high pressure
de Haas-van Alphen oscillations
Language
en
Abstract
The effect of pressures up to 7 kbar on portions of
the Fermi surfaces of zinc and aluminum has been determined
by using the field-modulation technique to detect de Haasvan
Alphen oscillations and by using solid helium as a
pressure medium. The primary result obtained in the study
of zinc was that the (0001) cross section of the needle
portion of the Fermi surface doubled at 3 kbar. This
observed behavior is qualitatively in agreement with predictions
based on the near1y-free-e1ectron model. A
quantitative comparison with this model is complicated/by
critical dependence on the cia ratio.
The pressure dependence of two Fermi surface cross
sections of aluminum was observed. The V-(110] cross
section decreased 0.47 Z 0.06% per kbar while the S-[100]
cross section increased 1.2 ± 0.15% per kbar. The near1yfree-
electron model would predict an increase of 0.074% per
kbar for both of these cross sections. The departure of
the observed effects from this value is attributed to changes
in the band structure of aluminum, which the near1y-freeelectron
model does not take into account. A simple model
is described which utilizes the pressure dependence of the
pseudopotential coefficients to predict changes in the Fermi
surface cross sections with pressure. The effects predicted
by this model are of the correct order of magnitude and sign
to explain the experimental observations.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
