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Instructors: Univ-Prof. Dr. Jure Demsar
Event type:
Lecture/practice class
Displayed in timetable as:
08.128.721
Hours per week:
4
Credits:
6,0
Language of instruction:
Englisch
Min. | Max. participants:
- | -
Requirements / organisational issues:
This lecture builds on the knowledge gained during the Bachelor studies (e.g. Solid State Physics).
Contents:
In this lecture we will focus on non-equilibrium phenomena in advanced solids (with focus on systems exhibiting low temperature macroscopic order like superconductors, charge/spin density waves, ferro- and anti-ferromagnets, multiferroics) which can be studied and manipulated by femtosecond time-resolved methods.
Femtosecond spectroscopy has experienced major developments in the recent two decades, providing access to femtosecond magnetization switching [1], studying of Higgs modes in superconductors [2], light induced enhancement of superconductivity [3], just to mention a few.
After introducing general principle of the so called “pump-probe” spectroscopy, we will discuss several case studies, where a new experimental technique (e.g. ultrafast electron diffraction) will be applied to study one of the above mentioned material classes (e.g. charge density waves [4]). This way we will learn about these novel laser-based techniques (used both in the lab or at large-scale facilities) and address physics of different material classes with fascinating functional properties.
[1] Stanciu et al., All-Optical Magnetic Recording with Circularly Polarized Light, Phys. Rev. Lett. 99, 047601 (2005).
[2] Matsunaga, et al., Light-induced collective pseudospin precession resonating with Higgs mode in a superconductor, Science 345, 1145 (2014).
[3] Mitrano, et al. Possible light-induced superconductivity in K3C60 at high temperature, Nature 530, 461 (2016).
[4] Eichberger et al., Snapshots of cooperative atomic motions in the optical suppression of Charge Density Waves, Nature 468, 799 (2010).
Recommended reading list:
B.E.A. Saleh, M.C. Teich: Fundamentals of Photonics, Wiley, 1991
Kittel: Introduction to Solid State physics
M. Dressel and G. Grüner, Electrodynamics of Solids
S. Blundell, "Magnetism in Condensed Matter" Oxford Master Series in Physics
M. Tinkham, Introduction to Superconductivity
G. Grüner: Density waves in solids
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Additional information:
The exact time and location of lectures will be determined upon the initial discussion with the participants during the first lecture.
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