P.C. Kwok, T.D. Schultz
Physical Review B
A one-sentence nonalgebraic evaluation of averages, such as occur in the theory of the Debye-Waller factor, is given, which is valid for certain types of anharmonic modes and also for ensembles more general than the canonical ensemble.
P.C. Kwok, T.D. Schultz
Physical Review B
B.D. Silverman, T.D. Schultz
Solid State Communications
Yaffa Tomkiewicz, R.A. Craven, et al.
Physical Review B
T.D. Schultz, D.C. Mattis, et al.
Reviews of Modern Physics