Spectra in the rotation-vibration region based on coherent phonon state

1984 ◽  
Vol 30 (3) ◽  
pp. 1096-1097
Author(s):  
Nazakat Ullah
Keyword(s):  
Coherent Phonon ◽  
Phonon State

scholarly journals Photoinduced multistage phase transitions in Ta2NiSe5

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Q. M. Liu ◽  
D. Wu ◽  
Z. A. Li ◽  
L. Y. Shi ◽  
Z. X. Wang ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Lattice Structure ◽  
Condensed Matter ◽  
Electronic States ◽  
Excitation Intensity ◽  
Coherent Phonon ◽  
Optical Penetration Depth ◽  
Transmission Electron ◽  
Metal Phase Transition ◽  
Atom Displacement

AbstractUltrafast control of material physical properties represents a rapidly developing field in condensed matter physics. Yet, accessing the long-lived photoinduced electronic states is still in its early stages, especially with respect to an insulator to metal phase transition. Here, by combining transport measurement with ultrashort photoexcitation and coherent phonon spectroscopy, we report on photoinduced multistage phase transitions in Ta2NiSe5. Upon excitation by weak pulse intensity, the system is triggered to a short-lived state accompanied by a structural change. Further increasing the excitation intensity beyond a threshold, a photoinduced steady new state is achieved where the resistivity drops by more than four orders at temperature 50 K. This new state is thermally stable up to at least 350 K and exhibits a lattice structure different from any of the thermally accessible equilibrium states. Transmission electron microscopy reveals an in-chain Ta atom displacement in the photoinduced new structure phase. We also found that nano-sheet samples with the thickness less than the optical penetration depth are required for attaining a complete transition.

High Thermoelectric Performance of ZnO by Coherent Phonon Scattering and Optimized Charge Transport

2021 ◽  
pp. 2105008
Author(s):  
Somnath Acharya ◽  
Byung‐Kyu Yu ◽  
Junphil Hwang ◽  
Jiyong Kim ◽  
Woochul Kim
Keyword(s):  
Charge Transport ◽  
Phonon Scattering ◽  
Thermoelectric Performance ◽  
Coherent Phonon

Coherent phonon-mediated dynamics for an addressable transducer of coupled micro-mechanical resonators

2021 ◽  
Vol 118 (20) ◽  
pp. 203505
Author(s):  
Zhi-Cheng Gong ◽  
Hao Fu ◽  
Tian-Hua Mao ◽  
Quan Yuan ◽  
Cheng-Yu Shen ◽  
...  
Keyword(s):  
Coherent Phonon ◽  
Mechanical Resonators

scholarly journals Influence of pulse width and detuning on coherent phonon generation

2015 ◽  
Vol 92 (14) ◽  
Author(s):  
Kazutaka G. Nakamura ◽  
Yutaka Shikano ◽  
Yosuke Kayanuma
Keyword(s):  
Pulse Width ◽  
Coherent Phonon ◽  
Phonon Generation

Spectral dependence of femtosecond relaxation and coherent phonon excitation inC60films

1997 ◽  
Vol 56 (7) ◽  
pp. 4176-4185 ◽  
Author(s):  
V. M. Farztdinov ◽  
A. L. Dobryakov ◽  
V. S. Letokhov ◽  
Yu. E. Lozovik ◽  
Yu. A. Matveets ◽  
...  
Keyword(s):  
Spectral Dependence ◽  
Coherent Phonon ◽  
Phonon Excitation
Sign in / Sign up

Export Citation Format

Share Document