Exploring the Charge Density Wave Phase of : Mott or Charge-Transfer Gap?

CJ Sayers, G Cerullo, Y Zhang, CE Sanders… - Physical Review Letters, 2023 - APS
1 T-TaSe 2 is widely believed to host a Mott metal-insulator transition in the charge density
wave (CDW) phase according to the spectroscopic observation of a band gap that extends …

Selective Electron–Phonon Coupling in Dimerized 1T-TaS2 Revealed by Resonance Raman Spectroscopy

SLLM Ramos, BR Carvalho, RL Monteiro Lobato… - ACS …, 2023 - ACS Publications
The layered transition-metal dichalcogenide material 1T-TaS 2 possesses successive phase
transitions upon cooling, resulting in strong electron–electron correlation effects and the …

Strong Coupling of Coherent Phonons to Excitons in Semiconducting Monolayer MoTe2

CJ Sayers, A Genco, C Trovatello, SD Conte… - Nano Letters, 2023 - ACS Publications
The coupling of the electron system to lattice vibrations and their time-dependent control and
detection provide unique insight into the nonequilibrium physics of semiconductors. Here …

Identification of soft modes across the commensurate-to-incommensurate charge density wave transition in

M Ruggeri, D Wolverson, V Romano, G Cerullo… - Physical Review B, 2024 - APS
1 T-TaSe 2 is a prototypical charge density wave (CDW) material for which electron-phonon
coupling and associated lattice distortion play an important role in driving and stabilizing the …

An Improved Theoretical Model to Extract the Optical Conductivity of Two-Dimensional Material from Terahertz Transmission or Reflection Spectroscopy

Q Wang, J Qin, Y Xiao, W Xu, L Ding - Electronics, 2023 - mdpi.com
The technique of terahertz time-domain spectroscopy (THz-TDS) enables us to
simultaneously determine the real and imaginary parts of optical parameters. However, it is …

Real‐Time Detection of Coherent Vibrational Dynamics in TiN Films

A Iudica, S Rotta Loria, C Mancarella… - Advanced Optical …, 2024 - Wiley Online Library
Titanium nitride (TiN) has recently gained considerable interest because of its remarkable
plasmonic properties and for its strong electron–phonon (e–ph) coupling, leading to …

Unconventional photoinduced charge density wave dynamics in

R Venturini, A Sarkar, P Sutar, Z Jagličić, Y Vaskivskyi… - Physical Review B, 2023 - APS
We investigated temperature (T)-dependent ultrafast near-infrared (NIR) transient reflectivity
dynamics in coexisting superconducting (SC) and charge density wave (CDW) phases of …

Anomalous Amplitude Mode Dynamics Below the Expected Charge‐Density‐Wave Transition in 1T‐VSe2

CJ Sayers, G Marini, M Calandra… - Advanced Physics …, 2024 - Wiley Online Library
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 …

Combining Raman and pump-probe spectroscopies: unveiling electron-phonon coupling dynamics in semiconductor materials

M Arnò - 2022 - politesi.polimi.it
This thesis explores a synergistic approach employing Raman spectroscopy and pump-
probe (PP) spectroscopy, aiming at undestanding semiconductor material dynamics …