Proximity effect in superconductors: Experimental and theoretical determination of the transition temperature
Jacobs, Allan Edward
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/2142/25750
Description
Title
Proximity effect in superconductors: Experimental and theoretical determination of the transition temperature
Author(s)
Jacobs, Allan Edward
Issue Date
1968
Doctoral Committee Chair(s)
Ginsberg, D.M.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
proximity effects
superconductors
transition temperature
superimposed film
Language
en
Abstract
This thesis is a report of the results of experimental and theoretical
investigations of the proximity effect in superconductors, with
particular reference to the measurement and prediction of the transition
temperature of superimposed films.
The theoretical work consists of two parts: (1) an extension of
the diffusion approximation theory due to de Gennes, Guyon and Werthamer;
this theory is valid only when the mean free paths in the two metals are
small compared to the respective coherence lengths, (ii) an extension,
under certain restrictive assumptions, of the above theory to all values
of the mean free paths.
The experimental work consists of measurements of the transition
temperature of superimposed films of indium and thallium deposited at low
temperatures. The experimental results are in good over-all agreement
with the theory but small deviations are observed. Similar but far less
extensive measurements have also been made for lead-indium films, for
which the strong electron-phonon coupling in lead might invalidate the
theory. The experimental results are again in good agreement with the
theory, showing that the strong-coupling effects are not large.
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.
