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Notes on superconducting hydrides.
- Source :
-
Physics Today . Jan2020, Vol. 73 Issue 1, p11-12. 2p. - Publication Year :
- 2020
-
Abstract
- In their article "The quest for room-temperature superconductivity in hydrides" ( I Physics Today i , May 2019, page 52), Warren Pickett and Mikhail Eremets commented that "in the late 1960s William McMillan of Bell Labs extended the [Bardeen-Cooper-Schrieffer] analysis to moderately strong coupling", which is measured by the electron-phonon coupling constant, . Specifically, McMillan realizes that I T i SB c sb from his equation declines when, on average, the phonon frequency becomes either too large or too small and searching for maximum I T i SB c sb leads to I i = 2. Since in 1968 it was believed that I T i SB c sb = 7.2 K and I i = 1.3 in Pb, McMillan concludes that I T i SB c sb may reach 9.2 K in a Pb alloy when I i = 2.8. [Extracted from the article]
- Subjects :
- *COUPLING constants
*DEBYE temperatures
*HYDRIDES
Subjects
Details
- Language :
- English
- ISSN :
- 00319228
- Volume :
- 73
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Physics Today
- Publication Type :
- Academic Journal
- Accession number :
- 140975517
- Full Text :
- https://doi.org/10.1063/PT.3.4379