Degree Type
Dissertation
Date of Award
1986
Degree Name
Doctor of Philosophy
Department
Physics and Astronomy
Abstract
It is well-known that a heavy impurity atom in a lattice of light atoms induces a lower frequency in-band resonance mode in the vibrational spectrum. The exact effect of such a mode on the lat- tice spectrum has not previously been reported and effects of such modes on superconductivity have not previously been described. Sputtered thin films of bcc Mo(,1-x)Re(,x), 0.2 0. (delta) increases with (lamda)(,R), the Re contribution to the electron-phonon coupling con- stant (lamda). The dependences of the anomalous softening and width of the resonance mode on (lamda)(,R) fit the Yu-Anderson theory of local pho- non screening by a Fermi gas of electrons treated as Tomonago;bosons. These results explain the low N(0), high T(,c) behavior of Mo(,.6)Re(,.4); *DOE Report IS-T-1246. This work was performed under contract No. W-7405-Eng-82 with the U.S. Department of Energy.
DOI
https://doi.org/10.31274/rtd-180813-12312
Publisher
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Copyright Owner
Danny Pak-Chum Shum
Copyright Date
1986
Language
en
Proquest ID
AAI8703769
File Format
application/pdf
File Size
108 pages
Recommended Citation
Shum, Danny Pak-Chum, "Electron tunneling studies of Mo1-xRex: enhancement of superconductivity by a resonance mode " (1986). Retrospective Theses and Dissertations. 8310.
https://lib.dr.iastate.edu/rtd/8310
