Existence of a Lifshitz Point in Incommensurate RbH3 (SeO3)2

Abstract
The temperature variation of the dielectric constant has been measured in RbH3 (SeO3)2 at various bias electric fields. The results show a nonlinear variation of the transition temperature between the incommensurate and the commensurate phase with the applied electric field; this is consistent with the existence of a Lifshitz point at the critical field EL49 kV/cm.