Emerging Nanoelectronic Devices focuses on the future direction of semiconductor and emerging nanoscale device technology. As the dimensional scaling of CMOS approaches its limits, alternate information processing devices and microarchitectures are being explored to sustain increasing functionality at decreasing cost into the indefinite future.  This is driving new paradigms of information processing enabled by innovative new devices, circuits, and architectures, necessary to support an increasingly interconnected world through a rapidly evolving internet. This original title provides a fresh perspective on emerging research devices in 26 up to date chapters written by the leading researchers in their respective areas. It supplements and extends the work performed by the Emerging Research Devices working group of the International Technology Roadmap for Semiconductors (ITRS).  Key features:  • Serves as an authoritative tutorial on innovative devices and architectures that populate the dynamic world of “Beyond CMOS” technologies. • Provides a realistic assessment of the strengths, weaknesses and key unknowns associated with each technology. • Suggests guidelines for the directions of future development of each technology. • Emphasizes physical concepts over mathematical development. • Provides an essential resource for students, researchers and practicing engineers.

Table of Contents:
Preface xix List of Contributors xxi Acronyms xxiii PART ONE INTRODUCTION 1 1 The Nanoelectronics Roadmap 3 James Hutchby 1.1 Introduction 3 1.2 Technology Scaling: Impact and Issues 4 1.3 Technology Scaling: Scaling Limits of Charge-based Devices 4 1.4 The International Technology Roadmap for Semiconductors 6 1.5 ITRS Emerging Research Devices International Technology Working Group 7 1.6 Guiding Performance Criteria 8 1.7 Selection of Nanodevices as Technology Entries 13 1.8 Perspectives 13 References 14 2 What Constitutes a Nanoswitch? A Perspective 15 Supriyo Datta, Vinh Quang Diep, and Behtash Behin-Aein 2.1 The Search for a Better Switch 15 2.2 Complementary Metal Oxide Semiconductor Switch: Why it Shows Gain 17 2.3 Switch Based on Magnetic Tunnel Junctions: Would it Show Gain? 20 2.4 Giant Spin Hall Effect: A Route to Gain 23 2.5 Other Possibilities for Switches with Gain 27 2.6 What do Alternative Switches Have to Offer? 29 2.7 Perspective 32 2.8 Summary 32 Acknowledgments 32 References 33 PART TWO NANOELECTRONIC MEMORIES 35 3 Memory Technologies: Status and Perspectives 37 Victor V. Zhirnov and Matthew J. Marinella 3.1 Introduction: Baseline Memory Technologies 37 3.2 Essential Physics of Charge-based Memory 38 3.3 Dynamic Random Access Memory 39 3.4 Flash Memory 43 3.5 Static Random Access Memory 49 3.6 Summary and Perspective 52 Appendix: Memory Array Interconnects 52 Acknowledgments 54 References 54 4 Spin Transfer Torque Random Access Memory 56 Jian-Ping Wang, Mahdi Jamali, Angeline Klemm, and Hao Meng 4.1 Chapter Overview 56 4.2 Spin Transfer Torque 57 4.3 STT-RAM Operation 60 4.4 STT-RAM with Perpendicular Anisotropy 63 4.5 Stack and Material Engineering for Jc Reduction 66 4.6 Ultra-Fast Switching of MTJs 71 4.7 Spin–Orbit Torques for Memory Application 72 4.8 Current Demonstrations for STT-RAM 73 4.9 Summary and Perspectives 73 References 74 5 Phase Change Memory 78 Rakesh Jeyasingh, Ethan C. Ahn, S. Burc Eryilmaz, Scott Fong, and H.-S. Philip Wong 5.1 Introduction 78 5.2 Device Operation 79 5.3 Material Properties 80 5.4 Device and Material Scaling to the Nanometer Size 88 5.5 Multi-Bit Operation and 3D Integration 93 5.6 Applications 97 5.7 Future Outlook 100 5.8 Summary 103 Acknowledgments 103 References 103 6 Ferroelectric FET Memory 110 Ken Takeuchi and An Chen 6.1 Introduction 110 6.2 Ferroelectric FET for Flash Memory Application 111 6.3 Ferroelectric FET for SRAM Application 115 6.4 System Consideration: SSD System with Fe-NAND Flash Memory 118 6.5 Perspectives and Summary 119 References 120 7 Nano-Electro-Mechanical (NEM) Memory Devices 123 Adrian M. Ionescu 7.1 Introduction and Rationale for a Memory Based on NEM Switch 123 7.2 NEM Relay and Capacitor Memories 126 7.3 NEM-FET Memory 130 7.4 Carbon-based NEM Memories 132 7.5 Opportunities and Challenges for NEM Memories 133 References 135 8 Redox-based Resistive Memory 137 Stephan Menzel, Eike Linn, and Rainer Waser 8.1 Introduction 137 8.2 Physical Fundamentals of Redox Memories 139 8.3 Electrochemical Metallization Memory Cells 144 8.4 Valence Change Memory Cells 149 8.5 Performance 154 8.6 Summary 158 References 158 9 Electronic Effect Resistive Switching Memories 162 An Chen 9.1 Introduction 162 9.2 Charge Injection and Trapping 164 9.3 Mott Transition 167 9.4 Ferroelectric Resistive Switching 170 9.5 Perspectives 173 9.6 Summary 176 References 176 10 Macromolecular Memory 181 Benjamin F. Bory and Stefan C.J. Meskers 10.1 Chapter Overview 181 10.2 Macromolecules 181 10.3 Elementary Physical Chemistry of Macromolecular Memory 184 10.4 Classes of Macromolecular Memory Materials and Their Performance 187 10.5 Perspectives 190 10.6 Summary 190 Acknowledgments 190 References 191 11 Molecular Transistors 194 Mark A. Reed, Hyunwook Song, and Takhee Lee 11.1 Introduction 194 11.2 Experimental Approaches 194 11.3 Molecular Transistors 213 11.4 Molecular Design 218 11.5 Perspectives 222 Acknowledgments 223 References 223 12 Memory Select Devices 227 An Chen 12.1 Introduction 227 12.2 Crossbar Array and Memory Select Devices 227 12.3 Memory Select Device Options 230 12.4 Challenges of Memory Select Devices 241 12.5 Summary 242 References 242 13 Emerging Memory Devices: Assessment and Benchmarking 246 Matthew J. Marinella and Victor V. Zhirnov 13.1 Introduction 246 13.2 Common Emerging Memory Terminology and Metrics 248 13.3 Redox RAM 249 13.4 Emerging Ferroelectric Memories 254 13.5 Mott Memory 258 13.6 Macromolecular Memory 259 13.7 Carbon-based Resistive Switching Memory 260 13.8 Molecular Memory 262 13.9 Assessment and Benchmarking 263 13.10 Summary and Conclusions 271 Acknowledgments 271 References 271 PART THREE NANOELECTRONIC LOGIC AND INFORMATION PROCESSING 277 14 Re-Invention of FET 279 Toshiro Hiramoto 14.1 Introduction 279 14.2 Historical and Future Trend of MOSFETs 279 14.3 Near-term Solutions 282 14.4 Long-term Solutions 285 14.5 Summary 295 References 296 15 Graphene Electronics 298 Frank Schwierz 15.1 Introduction 298 15.2 Properties of Graphene 300 15.3 Graphene MOSFETs for Mainstream Logic and RF Applications 303 15.4 Graphene MOSFETs for Nonmainstream Applications 308 15.5 Graphene NonMOSFET Transistors 309 15.6 Perspectives 310 Acknowledgment 311 References 311 16 Carbon Nanotube Electronics 315 Aaron D. Franklin 16.1 Carbon Nanotubes – The Ideal Transistor Channel 315 16.2 Operation of the CNTFET 319 16.3 Important Aspects of CNTFETs 320 16.4 Scaling CNTFETs to the Sub-10 Nanometer Regime 324 16.5 Material Considerations 327 16.6 Perspective 329 16.7 Conclusion 331 References 331 17 Spintronics 336 Alexander Khitun 17.1 Introduction 336 17.2 Spin Transistors 337 17.3 Magnetic Logic Circuits 348 17.4 Summary 364 References 365 18 NEMS Switch Technology 370 Louis Hutin and Tsu-Jae King Liu 18.1 Electromechanical Switches for Digital Logic 370 18.2 Actuation Mechanisms 373 18.3 Electrostatic Switch Designs 379 18.4 Reliability and Scalability 383 References 386 19 Atomic Switch 390 Tsuyoshi Hasegawa and Masakazu Aono 19.1 Chapter Overview 390 19.2 Historical Background of the Atomic Switch 390 19.3 Fundamentals of Atomic Switches 391 19.4 Various Atomic Switches 395 19.5 Perspectives 401 References 402 20 ITRS Assessment and Benchmarking of Emerging Logic Devices 405 Shamik Das 20.1 Introduction 405 20.2 Overview of the ITRS Roadmap for Emerging Research Logic Devices 406 20.3 Recent Results for Selected Emerging Devices 407 20.4 Perspective 412 20.5 Summary 413 Acknowledgments 413 References 413 PART FOUR CONCEPTS FOR EMERGING ARCHITECTURES 417 21 Nanomagnet Logic: A Magnetic Implementation of Quantum-dot Cellular Automata 419 Michael T. Niemier, György Csaba, and Wolfgang Porod 21.1 Introduction 419 21.2 Technology Background 420 21.3 NML Circuit Design Based on Conventional, Boolean Logic Gates 423 21.4 Alternative Circuit Design Techniques and Architectures 432 21.5 Retrospective, Future Challenges, and Future Research Directions 437 References 439 22 Explorations in Morphic Architectures 443 Tetsuya Asai and Ferdinand Peper 22.1 Introduction 443 22.2 Neuromorphic Architectures 443 22.3 Cellular Automata Architectures 447 22.4 Taxonomy of Computational Ability of Architectures 450 22.5 Summary 452 References 452 23 Design Considerations for a Computational Architecture of Human Cognition 456 Narayan Srinivasa 23.1 Introduction 456 23.2 Features of Biological Computation 457 23.3 Evolution of Behavior as a Basis for Cognitive Architecture Design 460 23.4 Considerations for a Cognitive Architecture 460 23.5 Emergent Cognition 463 23.6 Perspectives 463 References 464 24 Alternative Architectures for NonBoolean Information Processing Systems 467 Yan Fang, Steven P. Levitan, Donald M. Chiarulli, and Denver H. Dash 24.1 Introduction 467 24.2 Hierarchical Associative Memory Models 475 24.3 N-Tree Model 484 24.4 Summary and Conclusion 494 Acknowledgments 496 References 496 25 Storage Class Memory 498 Geoffrey W. Burr and Paul Franzon 25.1 Introduction 498 25.2 Traditional Storage: HDD and Flash Solid-state Drives 499 25.3 What is Storage Class Memory? 499 25.4 Target Specifications for SCM 501 25.5 Device Candidates for SCM 502 25.6 Architectural Issues in SCM 504 25.7 Conclusions 508 References 509 PART FIVE SUMMARY, CONCLUSIONS, AND OUTLOOK FOR NANOELECTRONIC DEVICES 511 26 Outlook for Nanoelectronic Devices 513 An Chen, James Hutchby, Victor V. Zhirnov, and George Bourianoff 26.1 Introduction 513 26.2 Quantitative Logic Benchmarking for Beyond CMOS Technologies 514 26.3 Survey-based Critical Assessment of Emerging Devices 518 26.4 Retrospective Assessment of ERD Tracked Technologies 526 References 528 Index 529