Excitation and detection of acoustic phonons in nanoscale systems

RC Ng, A El Sachat, F Cespedes, M Poblet, G Madiot… - Nanoscale, 2022 - pubs.rsc.org
Phonons play a key role in the physical properties of materials, and have long been a topic
of study in physics. While the effects of phonons had historically been considered to be a …

[HTML][HTML] Time-domain investigations of coherent phonons in van der waals thin films

F Vialla, N Del Fatti - Nanomaterials, 2020 - mdpi.com
Coherent phonons can be launched in materials upon localized pulsed optical excitation,
and be subsequently followed in time-domain, with a sub-picosecond resolution, using a …

Confinement‐Induced Phonon Softening and Hardening in Sb2Te3 Thin Films

J Mertens, P Kerres, Y Xu… - Advanced Functional …, 2024 - Wiley Online Library
Scaling effects in Sesqui‐chalcogenides are of major interest to understand and optimize
their performance in heavily scaled applications, including topological insulators and phase …

Microstructural and vibrational properties of PVT grown Sb2Te3 crystals

KA Kokh, VV Atuchin, TA Gavrilova… - Solid state …, 2014 - Elsevier
Abstract High-quality Sb 2 Te 3 microcrystals have been grown by the physical vapor
transport (PVT) method without using a foreign transport agent. The microcrystals grown …

[HTML][HTML] Femtosecond single-electron diffraction

S Lahme, C Kealhofer, F Krausz, P Baum - Structural Dynamics, 2014 - pubs.aip.org
Ultrafast electron diffraction allows the tracking of atomic motion in real time, but space
charge effects within dense electron packets are a problem for temporal resolution. Here, we …

Origin of coherent phonons in BiTe excited by ultrafast laser pulses

Y Wang, L Guo, X Xu, J Pierce… - Physical Review B …, 2013 - APS
Femtosecond laser pulses are used to excite coherent optical phonons in single crystal Bi 2
Te 3 thin films. Oscillations from low-and high-frequency A 1 g phonon modes are observed …

Dynamics of all the Raman-active coherent phonons in Sb2Te3 revealed via transient reflectivity

K Norimatsu, M Hada, S Yamamoto… - Journal of Applied …, 2015 - pubs.aip.org
The phonon dynamics in Sb 2 Te 3 is investigated using femtosecond time-resolved
reflection measurements. Time evolution of the reflectivity shows the dynamics of all of the …

Photo‐Induced Tellurium Segregation in MoTe2

T Fukuda, R Kaburauchi, Y Saito… - physica status solidi …, 2022 - Wiley Online Library
Herein, coherent phonon spectroscopy of polymorphic MoTe 2 single crystals using a
femtosecond‐pulsed laser is used to investigate the relationship between structural phase …

Thickness-dependent carrier and phonon dynamics of topological insulator Bi2Te3 thin films

J Zhao, Z Xu, Y Zang, Y Gong, X Zheng, K He… - Optics …, 2017 - opg.optica.org
As a new quantum state of matter, topological insulators offer a new platform for exploring
new physics, giving rise to fascinating new phenomena and new devices. Lots of novel …

Phonon dynamics in CuxBi2Se3 (x= 0, 0.1, 0.125) and Bi2Se2 crystals studied using femtosecond spectroscopy

HJ Chen, KH Wu, CW Luo, TM Uen, JY Juang… - Applied Physics …, 2012 - pubs.aip.org
Phonon dynamics in Bi, Bi 2 Se 2, and Cu x Bi 2 Se 3 (x= 0, 0.1, 0.125) single crystals was
investigated using femtosecond pump-probe spectroscopy. Two damped oscillations in …