DigitalCommons@University of Nebraska - Lincoln - Jaewu Choi, Peter A. Dowben, Shawn Pebley, A.V. Bune, Stephen Ducharme, V.M. Fridkin, S.P. Palto, and N. Petukhova: Changes in Metallicity and Electronic Structure Across the Surface Ferroelectric Transition of Ultrathin Crystalline Poly(vinylidene Fluoride-Trifluoroethylene) Copolymers

Research Papers in Physics and Astronomy

Peter Dowben Publications

Title

Changes in Metallicity and Electronic Structure Across the Surface Ferroelectric Transition of Ultrathin Crystalline Poly(vinylidene Fluoride-Trifluoroethylene) Copolymers

Authors

Jaewu Choi, University of Nebraska - Lincoln
Peter A. Dowben, University of Nebraska-Lincoln
Shawn Pebley, University of Nebraska - Lincoln
A.V. Bune, University of Nebraska - Lincoln
Stephen Ducharme, University of Nebraska
V.M. Fridkin, Institute of Crystallography, The Russian Academy of Sciences, Moscow, Russia
S.P. Palto, Institute of Crystallography, The Russian Academy of Sciences, Moscow, Russia
N. Petukhova, Institute of Crystallography, The Russian Academy of Sciences, Moscow, Russia

Document Type

Article

Date of this Version

February 1998

Comments

Abstract

The surface ferroelectric-paraelectric phase transition in crystalline copolymer films of vinylidene fluoride (70%) with trifluoroethylene (30%), at about 20 °C, is accompanied by a dramatic change in both the electronic structure and metallicity. The temperature-dependent changes in the electronic structure occur primarily in the conduction band. This P(VDF-TrFE 70:30) material is observed to resemble an n-type semiconductor, and the change in electronic structure at the surface ferroelectric transition resembles a semiconductor-to-semimetal transition.

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