66 citations · 172 across the 14 of their papers we have counts for
8 papers · 1 filter
Anomalous amplitude mode dynamics below the expected charge-density-wave transition in 1-VSe
Charles J. Sayers, Giovanni Marini, Matteo Calandra +6
A charge-density-wave (CDW) is characterized by a dynamical order parameter consisting of a time-dependent amplitude and phase, which manifest as optically-active collective modes…
Resonance-Induced Anomalies in Temperature-Dependent Raman Scattering of PdSe
Omar Abdul-Aziz, Daniel Wolverson, Charles Sayers +4
We report a comprehensive Raman study of the phonon behaviour in PdSe in the temperature range of 5 K to 300 K. A remarkable change in the Raman spectrum is observed at 120 K:…
Chiral excitations and the intermediate-field spin-liquid regime in the Kitaev magnet -RuCl
Anuja Sahasrabudhe, Mikhail A. Prosnikov, Thomas C. Koethe +6
In the Kitaev magnet -RuCl, the existence of a magnetic-field-induced quantum spin liquid phase and of anyonic excitations are discussed controversially. We address this elu…
Nonequilibrium dynamics of -RuCl -- a time-resolved magneto-optical spectroscopy study
Julian Wagner, Anuja Sahasrabudhe, Rolf Versteeg +5
We present time-resolved magneto-optical spectroscopy on the magnetic Mott-Hubbard-insulating Kitaev spin liquid candidate -RuCl to investigate the nonequilibrium dynamics o…
Magneto-optical study of metamagnetic transitions in the antiferromagnetic phase of -RuCl
Julian Wagner, Anuja Sahasrabudhe, Rolf Versteeg +7
-RuCl is a promising candidate material to realize the so far elusive quantum spin liquid ground state. However, at low temperatures, the coexistence of different exchange i…
Investigation of the Non-equilibrium State of Strongly Correlated Materials by Complementary Ultrafast Spectroscopy Techniques
Hamoon Hedayat, Charles J. Sayers, Arianna Ceraso +6
Photoinduced non-thermal phase transitions are new paradigms of exotic non-equilibrium physics of strongly correlated materials. An ultrashort optical pulse can drive the system to…
Coherent phonons and the interplay between charge density wave and Mott phases in 1-TaSe
C. J. Sayers, H. Hedayat, A. Ceraso +9
1-TaSe is host to coexisting strongly-correlated phases including charge density waves (CDWs) and an unusual Mott transition at low temperature. Here, we investigate coher…
Excitonic and lattice contributions to the charge density wave in 1T-TiSe revealed by a phonon bottleneck
Hamoon Hedayat, Charles J. Sayers, Davide Bugini +10
Understanding collective electronic states such as superconductivity and charge density waves is pivotal for fundamental science and applications. The layered transition metal dich…