Far-Infrared Properties of Lattice Resonant Modes. V. Second-Order Stark Effect

Authors

• B.P. Clayman, University of Nebraska-Lincoln
• Roger D. Kirby, University of Nebraska-LincolnFollow
• A. J. Sievers, University of Nebraska-Lincoln

Document Type

Article

Date of this Version

February 1971

Comments

Published Phys. Rev. B 3, 1, 351 (1971). Permission to use.

Abstract

Small electric-field-induced frequency shifts have been observed for resonant modes associated with three defect systems. For NaI: Clˉ, the shifts have been used to measure the quartic anharmonic terms of the interionic potential of the impurity ion. For KBr: Li⁺, the quartic anharmonic terms are found to be very small, and an harmonic potential which includes a central barrier with the barrier height less than the zero-point energy of the oscillator is required to explain the experimental results. For NaCl: Cu⁺, only an "on-center" resonant-mode configuration is consistent with the experimental results.