Polarons

Emin Provides Experimental And Theoretical Graduate Students And Researchers With A Distinctive Introduction To The Principles Governing Polaron Science. The Fundamental Physics Is Emphasized And Mathematical Formalism Is Avoided. The Book Gives A Clear Guide To How Different Types Of Polaron Form And The Measurements Used To Identify Them. Analyses Of Four Diverse Physical Problems Illustrate Polaron Effects Producing Dramatic Physical Phenomena. The First Part Of The Book Describes The Principles Governing Polaron And Bipolaron Formation In Different Classes Of Materials. The Second Part Emphasizes Distinguishing Electronic-transport And Optical Phenomena Through Which Polarons Manifest Themselves. The Book Concludes By Extending Polaron Concepts To Address Critical Aspects Of Four Multifaceted Electronic And Atomic Problems: Large Bipolarons' Superconductivity, Electronic Switching Of Small-polaron Semiconductors, Electronically Stimulated Atomic Desorption And Diffusion Of Light Interstitial Atoms-- Emin Provides Experimental And Theoretical Graduate Students And Researchers With A Distinctive Introduction To The Principles Governing Polaron Science. The Fundamental Physics Is Emphasized And Mathematical Formalism Is Avoided. The Book Gives A Clear Guide To How Different Types Of Polaron Form And The Measurements Used To Identify Them. Analyses Of Four Diverse Physical Problems Illustrate Polaron Effects Producing Dramatic Physical Phenomena-- Machine Generated Contents Note: Preface; Acknowledgements; 1. Succinct Overview; Part I. Polaron Formation: 2. Electron-phonon Interactions; 3. Weak-coupling Polarons: Carrier-induced Softening; 4. Strong-coupling: Self-trapping; 5. Dopant- And Defect-related Small Polarons; 6. Molecular Polarons; 7. Bipolarons; 8. Magnetic Polarons And Colossal Magneto-resistance; Part Ii. Polaron Properties: 9. Optical Properties; 10. Large-polaron Transport; 11. Small-polaron Transport; 12. Polarons' Seebeck Coefficients; 13. Polarons' Hall Effect; Part Iii. Extending Polaron Concept: 14. Superconductivity Of Large Bipolarons; 15. Non-ohmic Hopping Conduction And Electronic Switching; 16. Electronically Stimulated Desorption Of Atoms From Surfaces; 17. Hopping Of Light Atoms; References; Index. David Emin. Includes Bibliographical References (pages 198-208) And Index. Cover 1 Contents 7 Preface 11 Acknowledgments 18 1 Succinct overview 21 Part I Polaron Formation 27 2 Electron–phonon interactions 29 2.1 Long-range electron–phonon interaction 29 2.2 Short-range electron–phonon interactions 31 3 Weak-coupling polarons: carrier-induced softening 33 3.1 Long-range electron–phonon interaction 33 3.2 Short-range electron–phonon interactions 34 3.3 Two-site model: origin of carrier-induced softening 35 4 Strong coupling: self-trapping 41 4.1 Adiabatic formalism 41 4.2 Self-trapping 43 4.3 Scaling approach: large- and small-polaron formation 49 4.4 Self-trapping beyond the adiabatic limit 53 4.5 Disorder-assisted small-polaron formation 59 4.6 Synopsis 61 5 Dopant- and defect-related small polarons 63 5.1 Small polarons bound to dopants and defects 63 5.2 Small-polaronic impurity conduction 65 6 Molecular polarons 69 6.1 General features 69 6.2 Examples 72 7 Bipolarons 74 7.1 Large-bipolaron formation 75 7.2 Small-bipolarons: negative-U centers 78 7.3 Softening bipolarons 79 8 Magnetic polarons and colossal magnetoresistance 85 8.1 Magnetic polarons 86 8.2 Donor-state collapse in ferromagnets: colossal magnetoresistance 88 Part II Polaron Properties 93 9 Optical properties 95 9.1 Absorption from exciting polarons’ self-trapped carriers 95 9.2 Low-frequency absorption from polaron motion 98 9.3 Carriers’ photo-generation, recombination and luminescence 101 10 Large-polaron transport 106 10.1 Coherent versus incoherent transport 106 10.2 Large-polaron effective mass 108 10.3 Large-polaron scattering 111 11 Small-polaron transport 115 11.1 Loss of coherence and hopping transport 115 11.2 Two complementary types of hopping transport 116 11.3 Overview of polaron hopping 118 11.4 Non-adiabatic polaron jump rate 122 11.5 Semiclassical treatment of the non-adiabatic polaron jump rate 128 11.6 Semiclassical treatment of the adiabatic polaron jump rate 130 11.7 Vibrational relaxation and correlations between polaron jumps 138 11.8 Pair-breaking in semiclassical singlet-bipolaron hopping 141 11.9 Exchange interactions and polaron hopping in magnetic semiconductors 143 12 Polarons’ Seebeck coefficients 145 12.1 Definitions and general concepts 145 12.2 Hopping polarons’ Seebeck coefficients 147 12.3 Softening (bi)polarons’ Seebeck coefficients 149 12.4 Seebeck coefficients of polarons in magnetic semiconductors 153 13 Polarons’ Hall effect 155 13.1 Coherent transport’s Hall mobility 156 13.2 Microscopic treatment of electric and magnetic fields 158 13.3 Hall mobility for non-adiabatic polaron hopping 160 13.4 Hall mobility for adiabatic polaron hopping 167 13.5 Hall-effect signs for hopping conduction 175 Part III Extending Polaron Concepts 181 14 Superconductivity of large bipolarons 183 14.1 Interactions between large bipolarons 184 14.2 Condensation to a large-bipolaronic liquid 185 14.3 Superconductivity and excitations of a large-bipolaronic liquid 187 14.4 Distinctive properties of a large-bipolaronic superconductor 188 15 Non-Ohmic hopping conduction and electronic switching 193 15.1 Formalism for steady-state hopping 193 15.2 Low-temperature hopping in a disordered medium 195 15.3 Interfacial small-polaron accretion: a threshold switching mechanism 200 16 Electronically stimulated desorption of atoms from surfaces 206 16.1 Model Hamiltonian 207 16.2 Scaling analysis 209 17 Hopping of light atoms 211 17.1 High-temperature diffusion: excited coincidences and non-Condon transfers 211 17.2 Isotope dependences of light-atoms’ high-temperature diffusion constants 213 17.3 Isotope dependences of light-atoms’ low-temperature diffusion constants 216 References 218 Index 229 "Emin provides experimental and theoretical graduate students and researchers with a distinctive introduction to the principles governing polaron science. The fundamental physics is emphasized and mathematical formalism is avoided. The book gives a clear guide to how different types of polaron form and the measurements used to identify them. Analyses of four diverse physical problems illustrate polaron effects producing dramatic physical phenomena. The first part of the book describes the principles governing polaron and bipolaron formation in different classes of materials. The second part emphasizes distinguishing electronic-transport and optical phenomena through which polarons manifest themselves. The book concludes by extending polaron concepts to address critical aspects of four multifaceted electronic and atomic problems: large bipolarons' superconductivity, electronic switching of small-polaron semiconductors, electronically stimulated atomic desorption and diffusion of light interstitial atoms"-- Résumé de l'éditeur