Modern Aspects of Spin Physics (eBook)

Preface 6
Contents 9
List of Contributors 12
Semiconductor Spintronics 13
1 Why Spintronics? 13
2 Non-magnetic Semiconductors 16
3 Hybrid Structures 19
4 Diluted Magnetic Semiconductors 23
5 Properties of Ferromagnetic Semiconductors 31
6 Summary and Outlook 49
Acknowledgements 52
References 52
Lectures on the Spin Pairing Mechanism in High- Temperature Superconductors 59
1 Introduction 59
2 Superconductivity 60
3 Phonon-Mediated Effective Attraction between Electrons 62
4 BCS Theory 65
5 High-Temperature Superconductors 67
6 Pairing Mediated by Spin Fluctuations: Linear Response to Magnetic Excitations 71
References 77
Spin in Quantum Field Theory 78
1 From Quantum Mechanics to Field Theory 78
2 Spin and Statistics 79
3 A Path Integral for Spin 90
4 Relativistic Spinning Particles 97
5 Conclusion 104
Acknowledgement 105
References 105
Nucleon Spin 106
1 Introduction 106
2 Polarized Lepton-Nucleon Deep Inelastic Scattering 108
3 The Spin Crisis in the Parton Model 112
4 Resolution of the Spin Crisis: The Axial Anomaly 116
5 Matrix Elements of Angular Momentum Operators: The Problem 119
6 Relativistic Spin States 122
7 Matrix Elements of Angular Momentum Operators: The Results 124
8 Angular Momentum Sum Rules 129
9 Interpretation of the Sum Rules 137
References 138