scholarly journals Ultrafast optical excitation of coherent phonons in a one-dimensional metal at the photoinduced insulator-metal transition

2011 ◽  
Vol 84 (19) ◽  
Author(s):  
J. D. Lee ◽  
Pilkyung Moon ◽  
Muneaki Hase
Keyword(s):  
Optical Excitation ◽  
One Dimensional ◽  
Ultrafast Optical ◽  
Insulator Metal Transition ◽  
Coherent Phonons

scholarly journals Non-equilibrium lattice dynamics of one-dimensional In chains on Si(111) upon ultrafast optical excitation

2018 ◽  
Vol 5 (2) ◽  
pp. 025101 ◽  
Author(s):  
T. Frigge ◽  
B. Hafke ◽  
T. Witte ◽  
B. Krenzer ◽  
M. Horn-von Hoegen
Keyword(s):  
Lattice Dynamics ◽  
Optical Excitation ◽  
One Dimensional ◽  
Ultrafast Optical ◽  
Non Equilibrium

scholarly journals Ultrafast optical responses in one-dimensional Mott insulators of halogen-bridged Ni compounds

2009 ◽  
Vol 148 ◽  
pp. 012011
Author(s):  
S Tao ◽  
T Miyagoe ◽  
H Matsuzaki ◽  
H Ohtsu ◽  
M Hasegawa ◽  
...  
Keyword(s):  
Mott Insulators ◽  
One Dimensional ◽  
Ultrafast Optical ◽  
Optical Responses

scholarly journals Time-Domain Investigations of Coherent Phonons in van der Waals Thin Films

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2543
Author(s):  
Fabien Vialla ◽  
Natalia Del Fatti
Keyword(s):  
Thin Films ◽  
Time Domain ◽  
Van Der Waals ◽  
Optical Excitation ◽  
Thin Layers ◽  
Interface Defect ◽  
Optical And Electronic Properties ◽  
Coherent Phonons ◽  
Structural Configurations

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 time-delayed pulsed probe. This technique yields characterization of mechanical, optical, and electronic properties at the nanoscale, and is taken advantage of for investigations in material science, physics, chemistry, and biology. Here we review the use of this experimental method applied to the emerging field of homo- and heterostructures of van der Waals materials. Their unique structure corresponding to non-covalently stacked atomically thin layers allows for the study of original structural configurations, down to one-atom-thin films free of interface defect. The generation and relaxation of coherent optical phonons, as well as propagative and resonant breathing acoustic phonons, are comprehensively discussed. This approach opens new avenues for the in situ characterization of these novel materials, the observation and modulation of exotic phenomena, and advances in the field of acoustics microscopy.

Photo-modulated dynamic competition between metallic and insulating phases in a layered manganite

2014 ◽  
Vol 1636 ◽  
Author(s):  
Yuelin Li ◽  
Donald Walko ◽  
Qing’an Li ◽  
Yaohua Liu ◽  
Stephan Rosenkranz ◽  
...  
Keyword(s):  
Optical Excitation ◽  
Superlattice Reflection ◽  
Metallic Phase ◽  
Local Competition ◽  
Ultrafast Optical ◽  
Laser Fluences ◽  
Show Evidence ◽  
Jahn Teller ◽  
Insulating Phase ◽  
Reflection Intensity

ABSTRACTWe show evidence that the competition between the antiferromagnetic metallic phase and the charge- and orbital-ordered insulating phase at the reentrant phase boundary of a layered manganite, LaSr2Mn2O7, can be manipulated using ultrafast optical excitation. The time-dependent evolution of the Jahn-Teller superlattice reflection, the indicator of the formation of charge and orbital order, was measured at different laser fluences. The laser-induced change in the Jahn-Teller reflection intensity shows a reversal of sign between earlier (∼10 ns) and later (∼150 ns) times during the relaxation of the sample. This is consistent with a physics picture whereby the laser excitation modulates the local competition between the metallic and the insulating phases.

Control of coherent magnetization precession in GaMnAs by ultrafast optical excitation

2008 ◽  
Vol 5 (8) ◽  
pp. 2637-2640 ◽  
Author(s):  
J. Qi ◽  
Y. Xu ◽  
X. Liu ◽  
J. K. Furdyna ◽  
I. E. Perakis ◽  
...  
Keyword(s):  
Optical Excitation ◽  
Ultrafast Optical ◽  
Magnetization Precession

Pressure induced insulator-metal transition in quasi one-dimensional niobium tetraiodide

1978 ◽  
Vol 65 (4) ◽  
pp. 335-336 ◽  
Author(s):  
H. Kawamura ◽  
I. Shirotani ◽  
K. Tachikawa
Keyword(s):  
One Dimensional ◽  
Insulator Metal Transition
Sign in / Sign up

Export Citation Format

Share Document