Fiches de cours

Spin Dynamics

PHYS-745

Lecturer(s) :

Ansermet Jean-Philippe
Various lecturers

Language:

English

Frequency

Every year

Remarque

Next time: Fall

Summary

To acquire knowledge about the conceptual building blocks of spintronics, such as the fundament notions of magnetism, spin relaxation and diffusive transport, so as to be able to understand current research and the basic principles that led to breakthroughs in information technology.

Content

This course is intended to develop an understanding of the fundamental notions pertaining to spintronics: magnetism, transport and spin relaxation. The course contents will be as follows:

    1. Magnetoresistance, phenomenology, spin-dependent transport
    2. Thermodynamics of spin dependent transport, spin diffusion length, GMR
    3. Boltzmann theory : introduction, collisions with spin, two-current model, spin   accumulation
    4. Perpendicular transport and Berry phase : Boltzmann description of Hall and Nernst effect, Mott relations
    5. Rashba effect
    6. Topological Insulators
    7. Principles of spin relaxation : two-level system, relaxation by fluctuating fields, fluctuation-dissipation theorem, spin temperature
    8. Mechanisms of spin-flip: spin-orbit scattering, magnetic scattering, Elliott-Yafet and Dyakonov-Perel mechanisms
    9. Magnetic resonance : Bloch equations, ferromagnetic resonance, Landau-Lifshitz equation, Stoner-Wohlfarth relaxation
    10. Spin waves, magnons, Holstein-Primakov transformation
    11. Antiferromagnetic resonance, Pincus model, magnetic polaritons
    12. Coherent spin dynamics : resonant pulses, quantum mechanics of spin precession, spin echoes
    13. Quadrupolar echoes, double quantum coherence, coherence transfer
    14. Dynamic nuclear polarization : Overhauser effect, Thermal mixing

      The format of the course is ex cathedra classes followed by a presentation by one of the participant. Participants will be challenged to understand and present to the class one recent paper that would connect to some extent with their PhD research. As much as possible, the presentation will match with topic of the lecture of the same week.

      Occasionally, a member of the Institute of Physics, expert in one of the topics, may give the lecture.

      Keywords

      exchange, RKKY, DM, Rashba splitting, magnetic anisotropies

      spin relaxation, spin-dependent transport, magnetic resonance, spin waves

      Learning Prerequisites

      Recommended courses

      Quantum mechanics

      Prof. D. Grundler's course on magnetism

      Expected student activities

      to be able to understand recent research on spintronics or magnetic resonance

      Resources

      Ressources en bibliothèque
      Moodle Link

      In the programs

        • Semester
        • Exam form
           Oral
        • Credits
          4
        • Subject examined
          Spin Dynamics
        • Number of places
          28
        • Lecture
          28 Hour(s)
        • Exercises
          28 Hour(s)

      Reference week

       
            Lecture
            Exercise, TP
            Project, other

      legend

      • Autumn semester
      • Winter sessions
      • Spring semester
      • Summer sessions
      • Lecture in French
      • Lecture in English
      • Lecture in German