Abstract
We generalize Van Vleck's method of moments for disordered solid-state that can be described by an ensemble of hamiltonians. Special reference is made to N.M.R. spectroscopy. Inhomogeneous broadening for a sample of free spins and the more complex problem of interacting spins are discussed in detail. The cumulant expansion and the Liouville space formalism are introduced as tools to simplify the expressions for the moments and to obtain physical approximations. As a particular application the Sherrington-Kirkpatrick model for spin glasses is derived and interpreted physically.
Original language | English |
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Pages (from-to) | 1225-1239 |
Number of pages | 15 |
Journal | Molecular Physics |
Volume | 67 |
Issue number | 6 |
DOIs | |
State | Published - 20 Aug 1989 |