Insights on magnetic and semiconducting nanostructures
PHYS-646 / 2 crédits
Enseignant(s): Butté Raphaël, Rusponi Stefano
Langue: Anglais
Remark: Next time: Fall 24 (Block course)
Frequency
Every 2 years
Summary
Introduction to the magnetic and electronic properties of nanostructures
Content
1) Magnetism at the nanoscale:
a. Orbital and spin magnetic moment: from single atoms to 3D clusters
b. Measuring orbital and spin moments: x-ray magnetic circular dichroism
c. Intra- and inter-atomic exchange
d. Surface supported nanostructures: the effect of the supporting substrate on the nanostructure magnetic properties
e. Superparamagnetic limit in magnetic data storage
f. Quantum effects and spin dynamics in isolated atoms
2) Spintronics:
a. Spin transport: spin valve, GMR and TMR
b. Observing and controlling the magnetism of a single atom with a Scanning Tunnelling Microscope
3) Semiconductor quantum wells, a seminal example of quantum confinement:
a. Physics of electron and hole energy levels
b. Beyond the one-electron picture: case of excitons (binding energy, oscillator strength, optical matrix elements)
c. Excitonic and biexcitonic features in GaAs/AlGaAs QWs, transverse and longitudinal Stark effect
4) Optoelectronic properties of quantum dots:
a. Quantum confinement effects (from 2D to 0D)
b. Electronic states: specific features of single dots, excitonic complexes (excitons, biexcitons)
c. Biexciton-exciton cascade and single photon emission (2nd order correlation function)
d. Light-matter interaction with quantum dots: quantum dots in cavities; requirements for the Purcell effect
Note
Block course
Keywords
Electronic structure, magnetism, semiconductor, spin transport, optical properties of semiconducting nanostructures
Learning Prerequisites
Required courses
Good knowledge in condensed matter and quantum physics
Learning Outcomes
By the end of the course, the student must be able to:
- To describe the main electronic and magnetic properties of nanostructures
Dans les plans d'études
- Forme de l'examen: Exposé (session libre)
- Matière examinée: Insights on magnetic and semiconducting nanostructures
- Cours: 28 Heure(s)