Photoferroelectrics

by Vladimir M. Fridkin

Overview

Photoferroelectrics reviews a relatively new area of solid-state physics: nonequilibrium electronic processes in ferroelectrics and pyroelectrics. It highlights Soviet research largely unknown in the West.

The monograph covers theoretical and experimental work on the influence of photoexcitation on the physical properties of ferroelectrics. pyroelectrics and other nonlinear electro-optical materials. The thermodynamic and microscopic theory of photoferroelectric phenomena is presented. A considerable part of the book is devoted to the anomalous photovoltaic effect and photorefractive effect in ferroelectrics, and their applications in holography and optical storage.

Product Details

ISBN-13:	9783642813535
Publisher:	Springer Berlin Heidelberg
Publication date:	12/08/2011
Series:	Springer Series in Solid-State Sciences , #9
Edition description:	Softcover reprint of the original 1st ed. 1979
Pages:	176
Product dimensions:	6.10(w) x 9.25(h) x 0.02(d)

Table of Contents

1 Introduction 1

2 The Thermodynamics of Photoferroelectrics 3

2.1 The Free Energy of a Ferroelectric Semiconductor 5

2.2 First- and Second-Order Phase Transitions 8

2.3 Effect of Electrons on Phase Transitions: Photoferroelectric Phenomena 13

2.4 The Energy-Gap Anomaly 16

2.5 Electrical Conductivity of Ferroelectric Semiconductors Near the Curie Point 18

3 The Microscopic Theory of Photoferroelectric Phenomena 23

3.1 Ferroelectric Phase Transitions and the Soft Vibration Mode 23

3.2 Effect of Screening on the Soft Vibration Mode 27

3.3 Ferroelectric Phase Transitions and Interband Electron-Phonon Interactions 31

3.4 Change in Dipole Moment of Centres on Optical Recharging 35

3.5 Phasons and Fluctuons 38

4 Screening of Spontaneous Polarization 45

4.1 Debye Length as Screening Length Parameter in Ferro-electrics 46

4.2 Screening and Periodic Structure of Interphase Boundaries in Ferroelectrics 53

5 Photoferroelectric Phenomena and Photostimulated Phase Transitions 61

5.1 Thermodynamics of Photoferroelectric Phenomena 62

5.2 Photostimulated Shift of Phase Transition Temperature and Photohysteresis Effect 65

5.3 Influence of Electron Excitations on Spontaneous Polarization 76

5.4 Photodeformation Effect 78

5.5 Photoinduced Rayleigh Scattering in BaTi0₃ 81

6 The Anomalous Photovoltaic Effect in Ferroelectrics 85

6.1 The APV Effect in Ferroelectrics 87

6.2 Photovoltaic Current with Short-Circuited Electrodes 94

6.3 The Nature of the AP Effect in Ferroelectrics 103

6.3.1 Asymmetry of Impurity Centers and Frank-Condon Relaxation 103

6.3.2 Photoinduced Fluctuations 109

7 The Photorefractive Effect in Ferroelectrics 115

7.1 Mechanisms of the PR Effect in Ferroelectrics 117

7.1.1 The AP Effect 120

7.1.2 The Influence of Electron Excitations on Spontaneous Polarization 122

7.1.3 The Diffusion of Nonequilibrium Carriers 125

7.1.4 The Photoconductivity in an External Field 125

7.2 Photorefractive Holographic Recording 126

7.3 Photorefractive Sensitivity 131

7.4 Effect of Photorefraction on Multiphoton Excitation 137

8 Screening Phenomena 143

8.1 Influence of Nonequilibrium Carriers on Screening of Interfaces 143

8.2 Influence of Screening on Switching Processes 149

8.2.1 Photoswitching in SbSI 149

8.2.2 Photoswitching in PLZT 154

8.3 The Photodoma in Effect 155

8.3.1 The Photodoma in Effect in SbSI and BaTi0₃ 155

8.3.2 The Influence of Intrinsic Illumination on Pyrocurrents in SbSI and BaTi0₃ 160

8.4 Screening and Short-Circuit Photocurrents 163

References 167

Subject Index 173