Biographical Memoirs Volume 82 (2003) / Chapter Skim
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Walter David Knight
Walter David Knight
Pages 184-197
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From page 185... ...
Walter's name has been immortalizes! in conclensecI-matter physics as the discoverer of a nuclear magnetic resonance phenomenon known as the "Knight shift." It was a major clevelopment in the unclerstancling of the electronic properties of metals, and to this day remains a mainstay tool in research on metals, alloys, and superconductors.
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From page 186... ...
His graduate work was at Duke University, where before his World War II military service as a radar officer in the U.S. Navy, he received an M.A.
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From page 187... ...
There one reacts about the events that lee! to his important discovery of the shift in nuclear magnetic resonance frequencies that occurs in metals en cl provides a probe of the local internal fielcis in materials without disturbing the basic structure of the system uncler study.
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From page 188... ...
opener! up an important subfielcl of research on nuclear magnetic resonance.
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From page 189... ...
~ In aciclition to research papers Walter over the years wrote influential reviews. His 1956 review "Electron Paramagnetism en cl Nuclear Magnetic Resonance in Metals," publisher!
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From page 190... ...
Walter's first involvement with small metallic particles goes back to his work in the 1960s on the Knight shift in superconductors. Later in that clecacle he became very interestecl in the possibility of observing quantum size effects in small systems (or nanoclusters, as they are often referred to nowaciays)
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From page 191... ...
It was preclictecl that for temperatures kBT |
From page 192... ...
The discovery of shell structure was followocl by a clecacle of further funciamental contributions by Walter, his students, and postdocs to the field of metal cluster physics. Space limitations prevent us from a cletailecl account of these results, so we shall only briefly mention benchmark
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From page 193... ...
that his work on metal clusters has generated interest across so many research clisciplines, attracting solicI-state, atomic, chemical, en cl even nuclear physicists. (Shell effects analogous to those in metal clusters were recently cliscoverecl in the quantized conduction spectra of metal nanowires.
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From page 194... ...
We drew upon the recollections of Walter's friends, colleagues, and family, and upon his autobiographical article entitled "The Knight Shift" published in the Encyclopedia of Nuclear Magnetic Resonance, vol. 1, edited by D
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From page 195... ...
Herring. The effect of electronic paramagnetism on nuclear magnetic resonance frequencies in metals.
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From page 196... ...
Spin reversing scattering and nuclear magnetic resonance in superconducting tin.
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From page 197... ...
de Heer. Surface plasma resonances in free metal clusters.
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