Publications (10)
Lattice phonon modes of the spin crossover crystal [Fe(phen)2(NCS)2] studied by THz, IR, Raman spectroscopies and DFT calculations
Eric Collet, Giovanni Azzolina, Tomoaki Ichii +9
[Fe(phen)2(NCS)2] is a prototype transition metal complex material, which undergoes a phase transition between low-spin (LS) and high-spin (HS) phases, induced by temperature, pres…
Coherent and Incoherent Structural Dynamics in Laser-Excited Antimony
Lutz Waldecker, Tobias Zier, Thomas Vasileiadis +5
We investigate the excitation of phonons in photoexcited antimony and demonstrate that the entire electron-lattice interactions, in particular coherent and incoherent electron-phon…
Time-Domain Separation of Optical Properties From Structural Transitions in Resonantly Bonded Materials
Lutz Waldecker, Timothy A. Miller, Miquel Rude +6
The extreme electro-optical contrast between crystalline and amorphous states in phase change materials is routinely exploited in optical data storage and future applications inclu…
Ultrafast heat flow in heterostructures of Au nanoclusters on thin-films: atomic-disorder induced by hot electrons
Thomas Vasileiadis, Lutz Waldecker, Dawn Foster +5
We study the ultrafast structural dynamics, in response to electronic excitations, in heterostructures composed of Au nanoclusters on thin-film substrates with the use of f…
Landau Theory for Non-Symmetry-Breaking Electronic Instability Coupled to Symmetry-Breaking Applied to Prussian Blue Analogue
Giovanni Azzolina, Roman Bertoni, Claude Ecolivet +3
Different types of ordering phenomena may occur during phase transitions, described within the universal framework of the Landau theory through the evolution of one, or several, sy…
Generation and evolution of spin-, valley- and layer-polarized excited carriers in inversion-symmetric WSe2
Roman Bertoni, Christopher W. Nicholson, Lutz Waldecker +11
Manipulation of spin and valley degrees of freedom is a key step towards realizing novel quantum technologies, for which atomically thin transition metal dichalcogenides (TMDCs) ha…