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The Range of g‐Factors and the Breakdown of Motional Narrowing in Conduction Electron Spin Resonance
Author(s) -
Dupree R.,
Holland B. W.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670240126
Subject(s) - motional narrowing , condensed matter physics , laser linewidth , fermi surface , electron , electron paramagnetic resonance , chemistry , perturbation (astronomy) , fermi level , resonance (particle physics) , atomic physics , fermi gas , physics , nuclear magnetic resonance , spectral line , quantum mechanics , laser , superconductivity
It is suggested that the recent measurements of electron spin resonance in aluminium [1] indicate that motional narrowing is absent at low temperatures and the linewidth is deter‐mined by the spread in g ‐factors over the Fermi surface. Using first order perturbation theory an upper limit to the g ‐shift as a function of position on the Fermi surface is derived, and its consistency with all the g ‐shift observations on metals to date is demonstrated. An upper limit to the range of g ‐factors over the Fermi surface of aluminium is estimated and is found to give strong support to the hypothesis that motional narrowing is absent at low temperatures. It is pointed out that the usual simple theories of motional narrowing are not applicable and some implications for other metals are discussed.