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