Measurement of the lowest-order nonlinear susceptibility in IIIV semiconductors by second-harmonic generation with a CO2 laserJ.J. WynneN. Bloembergen1969Physical ReviewPaper
Comparison of hindered-rotor and tunneling models for dipolar impurities in cubic crystalsR.W. Dreyfus1969Physical ReviewPaper
Role of quantum dipole fluctuations in the theory of excitons and of the dielectric constant of crystalsJean Heinrichs1969Physical ReviewPaper
Theory of a structural phase transition in perovskite-type crystalsE. PytteJ. Feder1969Physical ReviewPaper
Excitation of multiple-magnon bound states in CoCl2•2H2OJ.B. Torrance Jr.M. Tinkham1969Physical ReviewPaper