Symmetry breaking is a basic concept of physics, and its significance is well recognized in particle physics. In condensed matter, one can design symmetry breaking to induce a material function. The main object in this course is magnetic ferroelectrics, which is often referred to as multiferroics. Magneto-electric effects, directional birefringence and dichroism of the light, and the motion of quasiparticles in multiferroics will be discussed.
The students will be able to design the material functions by considering spontaneous symmetry breaking, and to understand the quasiparticle motion in a symmetry-broken medium.
Symmetry breaking, Magnetoelectric effect, Directional dichroism, Quasiparticle
✔ Specialist skills | Intercultural skills | Communication skills | Critical thinking skills | ✔ Practical and/or problem-solving skills |
Reports will be given to test comprehension.
Course schedule | Required learning | |
---|---|---|
Class 1 | Linear Magneto-electric Effect | Understanding of the Condition for Linear Magnetoelectric Effects |
Class 2 | Symmetry Breaking and Multipoles | Understanding of the Relation between Multipolar Order and Linear Magnetoelectric Effect |
Class 3 | Nonlinear Magnetoelectric Effect | Design of Spin-driven Ferroelectricity |
Class 4 | Electric-field Induced Magnetization Reversal | Understanding of Multivalley Free-energy Function and Domain Structure |
Class 5 | Quantum-beam Measurements | Understanding of the Usefulness of Quantum Beams |
Class 6 | Nonreciprocal Directional Dichroism of Electromagnetic Wave | Understanding of the Relation between Directional Birefringence, Directional Dichroism, and Magneto-electric Effect |
Class 7 | Quasiparticles in a Symmetry-Broken Medium | Understanding of the Effects of Symmetry Breaking on Quasiparticles |
No textbook
No English Reference
Attendances and Reports
なし