ISBN-10:
0387094180
ISBN-13:
9780387094182
Pub. Date:
08/28/1979
Publisher:
Springer London, Limited
Photoferroelectrics

Photoferroelectrics

by Vladimir M. Fridkin

Hardcover

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Product Details

ISBN-13: 9780387094182
Publisher: Springer London, Limited
Publication date: 08/28/1979
Series: Solid-State Sciences Series , #9
Pages: 174
Product dimensions: 6.50(w) x 1.50(h) x 9.50(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

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