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Probing collective excitations in correlated systems using inelastic x-ray scattering - principles and examples

Tacon, M. le

Abstract (englisch):
Collective excitations are a central concept in condensed matter physics, tightly related to the notions of phase transitions and broken symmetries widely encountered in materials.
Studying the collective excitations of a material and their coupling to the various available
degrees of freedoms is therefore a crucial step towards a quantitative understanding of its properties and in particular of its phase diagram.
Inthis talk, 1 will review recent experimental progresses in resonant [1) and non-resonant [2) inelastic x-ray scattering methods that now enable the investigation of collective excitations with very high energy resolution. 1 will illustrate fundamental concepts with concretes examples from recent research, focusing in particular on collective lattice (phonons) and magnetic (magnons) excitations.
References
(1) L. J. P. Ament,et al. Resonant inelastic x-ray scattering studies of elementary excitations, Reviews of Modem Physics 83, 705 (2011).
[2] A.Q.R. Baron,lntroduction to high resolution inelastic x-ray scattering



Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Publikationstyp Vortrag
Publikationsdatum 19.11.2019
Sprache Englisch
Identifikator KITopen-ID: 1000100054
HGF-Programm 43.21.01 (POF III, LK 01) Quantum Correlations in Condensed Matter
Veranstaltung Fermi Surfaces and Novel Phases in Strongly Correlated Electrons Systems (2019), Les Houches, Frankreich, 13.10.2019 – 19.10.2019
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