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Linear current-voltage pattern, has been and continues to be the basis for characterizing, evaluating performance, and designing integrated circuits, but is shown not to hold its supremacy as channel lengths are being scaled down. In a nanoscale circuit with reduced dimensionality in one or more of the three Cartesian directions, quantum effects transform the carrier statistics. In the high electric field, the collision free ballistic transform is predicted, while in low electric field the transport remains predominantly scattering-limited. In a micro/nano-circuit, even a low logic voltage of…mehr
Linear current-voltage pattern, has been and continues to be the basis for characterizing, evaluating performance, and designing integrated circuits, but is shown not to hold its supremacy as channel lengths are being scaled down. In a nanoscale circuit with reduced dimensionality in one or more of the three Cartesian directions, quantum effects transform the carrier statistics. In the high electric field, the collision free ballistic transform is predicted, while in low electric field the transport remains predominantly scattering-limited. In a micro/nano-circuit, even a low logic voltage of 1 V is above the critical voltage triggering nonohmic behavior that results in ballistic current saturation. A quantum emission may lower this ballistic velocity.
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Autorenporträt
François Triozon has been a permanent researcher since 2005 at CEA-LETI, in Grenoble, France. His research focuses on the simulation of electron transport in nanodevices, using semi-classical and quantum methods. Philippe Dollfus is currently Director of Research (CNRS) at the Center for Nanoscience and Nanotechnology, Orsay, France. His research activity covers different fields of computational nanoelectronics.
Inhaltsangabe
Preface xiii List of Symbols xv List of Abbreviations xvii Chapter 1 Introduction: Nanoelectronics, Quantum Mechanics, and Solid State Physics 1 Philippe Dollfus and François Triozon 1.1 Nanoelectronics 1 1.2 Basic notions of solid-state physics 4 1.3 Quantum mechanics and electronic transport 20 1.4 Conclusion 29 1.5 Bibliography 30 Chapter 2 Electronic Transport: Electrons, Phonons and Their Coupling within the Density Functional Theory 31 Nathalie Vast, Jelena Sjakste, Gaston Kané and Virginie Trinité 2.1 Introduction 31 2.2 Electronic structure 34 2.3 Phonons 46 2.4 Electron-phonon coupling 52 2.5 Semiclassical transport properties 62 2.6 Quantum transport 70 2.7 Conclusion 84 2.8 Appendix A 85 2.9 Blbiography 86 Chapter 3 Electronic Band Structure: Empirical Pseudopotentials, k . p and Tight-Binding Methods 97 Denis Rideau, François Triozon and Philippe Dollfus 3.1 Band structure problem 97 3.2 Empirical pseudopotentials method 102 3.3 the k . p method 109 3.4 The TB method 115 3.5 Optimization of empirical models 122 3.6 Bibliography 126 Chapter 4 Relevant Semiempirical Potentials for Phonon Properties 131 Sebastian Volz 4.1 Introduction 131 4.2 Generic pair potentials: the Lennard-Jones potential 134 4.3 Semiconductors: Stillinger-Weber and Tersoff potentials 136 4.4 Oxydes: Van Beest, Kramer and van Santen potential 143 4.5 Metals - isotropic many-body pair-functional potentials for metals: the modified embedded-atom method 148 4.6 Polymers and carbon-based compounds: adaptive intermolecular reactive bond order, adaptive intermolecular REBO and Dreiding potentials 149 4.7 Water: TIP3P potential 156 4.8 Conclusion 158 4.9 Bibliography 158 Chapter 5 Introduction to Quantum Transport 163 François Triozon, Stephan Roche and Yann-Michel Niquet 5.1 Quantum transport from the point of view of wavepacket propagation 164 5.2 The transmission formalism for the conductance 177 5.3 The Green's function method for quantum transmission 185 5.4 Conclusion 219 5.5 Matlab/Octave codes 219 5.6 Bibliography 220 Chapter 6 Non-Equilibrium Green's Function Formalism 223 Michel Lannoo and Marc Bescond 6.1 Second quantization and time evolution pictures 223 6.2 General definition of the Green's functions, their physical meaning and their perturbation expansion 225 6.3 Stationary Green's functions and fluctuation-dissipation theorem 229 6.4 Dyson's equation and self-energy: general formulation 232 6.5 Some examples 237 6.6 The ballistic regime 240 6.7 The electron-photon interaction 245 6.8 Bibliography 257 Chapter 7 Electron Devices Simulation with Bohmian Trajectories 261 Guillermo Albareda, Damiano Marian, Abdelilah Benali, Alfonso Alarcon, Simeon Moises and Xavier Oriols 7.1 Introduction: why Bohmian mechanics? 261 7.2 Theoretical framework: Bohmian mechanics 267 7.3 The BITLLES simulator: time-resolved electron transport 276 7.4 Computation of the electrical current and its moments with BITLLES 291 7.5 Conclusion 299 7.6 Acknowlegments 301 7.7 Appendix A: Pratical algorithm to compute Bohmian trajectories 301 7.8 Appendix B: Ramo-Shockley-Pellegrini theorems 306 7.9 Appendix C: Bohmian mechanics with operators 307 7.10 Appendix D: Relation between the Wigner distribution function and the Bohmian trajectories 310 7.11 Bibliography 314 Chapter 8 The Monte Carlo Method for Wigner and Boltzmann Transport Equations 319 Philippe Dollfus, Damien Querlioz and Jérôme Saint Martin 8.1 The WTE 320 8.2 The semiclassical limit: BTE 325 8.3 Scattering in Boltzmann and Wigner equations 329 8.4 The MC method for solving the BTE 341 8.5 Extension of the MC method for solving the WBTE 352 8.6 Bibliography 360 List of Authors 371 Index 373
Preface xiii List of Symbols xv List of Abbreviations xvii Chapter 1 Introduction: Nanoelectronics, Quantum Mechanics, and Solid State Physics 1 Philippe Dollfus and François Triozon 1.1 Nanoelectronics 1 1.2 Basic notions of solid-state physics 4 1.3 Quantum mechanics and electronic transport 20 1.4 Conclusion 29 1.5 Bibliography 30 Chapter 2 Electronic Transport: Electrons, Phonons and Their Coupling within the Density Functional Theory 31 Nathalie Vast, Jelena Sjakste, Gaston Kané and Virginie Trinité 2.1 Introduction 31 2.2 Electronic structure 34 2.3 Phonons 46 2.4 Electron-phonon coupling 52 2.5 Semiclassical transport properties 62 2.6 Quantum transport 70 2.7 Conclusion 84 2.8 Appendix A 85 2.9 Blbiography 86 Chapter 3 Electronic Band Structure: Empirical Pseudopotentials, k . p and Tight-Binding Methods 97 Denis Rideau, François Triozon and Philippe Dollfus 3.1 Band structure problem 97 3.2 Empirical pseudopotentials method 102 3.3 the k . p method 109 3.4 The TB method 115 3.5 Optimization of empirical models 122 3.6 Bibliography 126 Chapter 4 Relevant Semiempirical Potentials for Phonon Properties 131 Sebastian Volz 4.1 Introduction 131 4.2 Generic pair potentials: the Lennard-Jones potential 134 4.3 Semiconductors: Stillinger-Weber and Tersoff potentials 136 4.4 Oxydes: Van Beest, Kramer and van Santen potential 143 4.5 Metals - isotropic many-body pair-functional potentials for metals: the modified embedded-atom method 148 4.6 Polymers and carbon-based compounds: adaptive intermolecular reactive bond order, adaptive intermolecular REBO and Dreiding potentials 149 4.7 Water: TIP3P potential 156 4.8 Conclusion 158 4.9 Bibliography 158 Chapter 5 Introduction to Quantum Transport 163 François Triozon, Stephan Roche and Yann-Michel Niquet 5.1 Quantum transport from the point of view of wavepacket propagation 164 5.2 The transmission formalism for the conductance 177 5.3 The Green's function method for quantum transmission 185 5.4 Conclusion 219 5.5 Matlab/Octave codes 219 5.6 Bibliography 220 Chapter 6 Non-Equilibrium Green's Function Formalism 223 Michel Lannoo and Marc Bescond 6.1 Second quantization and time evolution pictures 223 6.2 General definition of the Green's functions, their physical meaning and their perturbation expansion 225 6.3 Stationary Green's functions and fluctuation-dissipation theorem 229 6.4 Dyson's equation and self-energy: general formulation 232 6.5 Some examples 237 6.6 The ballistic regime 240 6.7 The electron-photon interaction 245 6.8 Bibliography 257 Chapter 7 Electron Devices Simulation with Bohmian Trajectories 261 Guillermo Albareda, Damiano Marian, Abdelilah Benali, Alfonso Alarcon, Simeon Moises and Xavier Oriols 7.1 Introduction: why Bohmian mechanics? 261 7.2 Theoretical framework: Bohmian mechanics 267 7.3 The BITLLES simulator: time-resolved electron transport 276 7.4 Computation of the electrical current and its moments with BITLLES 291 7.5 Conclusion 299 7.6 Acknowlegments 301 7.7 Appendix A: Pratical algorithm to compute Bohmian trajectories 301 7.8 Appendix B: Ramo-Shockley-Pellegrini theorems 306 7.9 Appendix C: Bohmian mechanics with operators 307 7.10 Appendix D: Relation between the Wigner distribution function and the Bohmian trajectories 310 7.11 Bibliography 314 Chapter 8 The Monte Carlo Method for Wigner and Boltzmann Transport Equations 319 Philippe Dollfus, Damien Querlioz and Jérôme Saint Martin 8.1 The WTE 320 8.2 The semiclassical limit: BTE 325 8.3 Scattering in Boltzmann and Wigner equations 329 8.4 The MC method for solving the BTE 341 8.5 Extension of the MC method for solving the WBTE 352 8.6 Bibliography 360 List of Authors 371 Index 373
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