The Experts below are selected from a list of 166599 Experts worldwide ranked by ideXlab platform
Ye Tao - One of the best experts on this subject based on the ideXlab platform.
-
photoinduced coherent acoustic Phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x ray pulses
Applied Physics Letters, 2017Co-Authors: Bingbing Zhang, Jian Liu, Xu Wei, Darui Sun, Q J Jia, Ye TaoAbstract:We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 film by femtosecond X-ray diffraction using a laser plasma-based X-ray source. The ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by photoinduced quasiparticles (QPs). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs are charge neutral excitons. Mapping the Phonon propagation and correlating its dynamics with the QP by ultrafast X-ray diffraction (UXRD) establish a powerful way to study electron-Phonon coupling and uncover the exotic physics in strongly correlated systems under nonequilibrium conditions.We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 film by femtosecond X-ray diffraction using a laser plasma-based X-ray source. The ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by photoinduced quasiparticles (QPs). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs ar...
-
photoinduced coherent acoustic Phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x ray pulses
arXiv: Atomic and Molecular Clusters, 2017Co-Authors: Bingbing Zhang, Jian Liu, Xu Wei, Darui Sun, Q J Jia, Ye TaoAbstract:We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 by femtosecond X-ray diffraction using a laser plasma-based X-ray source. Ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of the (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by the photoinduced quasiparticles (QP). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing a normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs are charge neutral excitons. Mapping the Phonon propagation and correlating its dynamics with the QP by ultrafast X-ray diffraction (UXRD) establish a powerful way to study electron-Phonon coupling and uncover the exotic physics in strongly correlated systems under nonequilibrium conditions.
C V Shank - One of the best experts on this subject based on the ideXlab platform.
-
investigation of femtosecond electronic dephasing in cdse nanocrystals using quantum beat suppressed photon echoes
SPIE milestone series, 2005Co-Authors: R W Schoenlein, Daniel M Mittleman, J J Shiang, A P Alivisatos, C V ShankAbstract:We report the first direct measurements of femtosecond electronic dephasing in CdSe nanocrystals using three-pulse photon echoes and a novel mode-suppression technique. We are able to separate the dynamics of the coherently excited LO Phonons from the underlying electron-hole dephasing by suppressing the quantum beats. The homogeneous linewidth of these materials at 15 K results from electronic dephasing in -85 fs, approximately half of which is due to acoustic Phonon modes. Contributions from acoustic Phonons dominate the homogeneous linewidth at room temperature.
-
investigation of femtosecond electronic dephasing in cdse nanocrystals using quantum beat suppressed photon echoes
Physical Review Letters, 1993Co-Authors: R W Schoenlein, Daniel M Mittleman, J J Shiang, A P Alivisatos, C V ShankAbstract:We report the first direct measurements of femtosecond electronic dephasing in CdSe nanocrystals using three-pulse photon echoes and a novel mode-suppression technique. We are able to separate the dynamics of the coherently excited LO Phonons from the underlying electron-hole dephasing by suppressing the quantum beats. The homogeneous linewidth of these materials at 15 K results from electronic dephasing in \ensuremath{\sim}85 fs, approximately half of which is due to acoustic Phonon modes. Contributions from acoustic Phonons dominate the homogeneous linewidth at room temperature.
Bingbing Zhang - One of the best experts on this subject based on the ideXlab platform.
-
photoinduced coherent acoustic Phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x ray pulses
Applied Physics Letters, 2017Co-Authors: Bingbing Zhang, Jian Liu, Xu Wei, Darui Sun, Q J Jia, Ye TaoAbstract:We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 film by femtosecond X-ray diffraction using a laser plasma-based X-ray source. The ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by photoinduced quasiparticles (QPs). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs are charge neutral excitons. Mapping the Phonon propagation and correlating its dynamics with the QP by ultrafast X-ray diffraction (UXRD) establish a powerful way to study electron-Phonon coupling and uncover the exotic physics in strongly correlated systems under nonequilibrium conditions.We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 film by femtosecond X-ray diffraction using a laser plasma-based X-ray source. The ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by photoinduced quasiparticles (QPs). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs ar...
-
photoinduced coherent acoustic Phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x ray pulses
arXiv: Atomic and Molecular Clusters, 2017Co-Authors: Bingbing Zhang, Jian Liu, Xu Wei, Darui Sun, Q J Jia, Ye TaoAbstract:We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 by femtosecond X-ray diffraction using a laser plasma-based X-ray source. Ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of the (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by the photoinduced quasiparticles (QP). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing a normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs are charge neutral excitons. Mapping the Phonon propagation and correlating its dynamics with the QP by ultrafast X-ray diffraction (UXRD) establish a powerful way to study electron-Phonon coupling and uncover the exotic physics in strongly correlated systems under nonequilibrium conditions.
R W Schoenlein - One of the best experts on this subject based on the ideXlab platform.
-
investigation of femtosecond electronic dephasing in cdse nanocrystals using quantum beat suppressed photon echoes
SPIE milestone series, 2005Co-Authors: R W Schoenlein, Daniel M Mittleman, J J Shiang, A P Alivisatos, C V ShankAbstract:We report the first direct measurements of femtosecond electronic dephasing in CdSe nanocrystals using three-pulse photon echoes and a novel mode-suppression technique. We are able to separate the dynamics of the coherently excited LO Phonons from the underlying electron-hole dephasing by suppressing the quantum beats. The homogeneous linewidth of these materials at 15 K results from electronic dephasing in -85 fs, approximately half of which is due to acoustic Phonon modes. Contributions from acoustic Phonons dominate the homogeneous linewidth at room temperature.
-
investigation of femtosecond electronic dephasing in cdse nanocrystals using quantum beat suppressed photon echoes
Physical Review Letters, 1993Co-Authors: R W Schoenlein, Daniel M Mittleman, J J Shiang, A P Alivisatos, C V ShankAbstract:We report the first direct measurements of femtosecond electronic dephasing in CdSe nanocrystals using three-pulse photon echoes and a novel mode-suppression technique. We are able to separate the dynamics of the coherently excited LO Phonons from the underlying electron-hole dephasing by suppressing the quantum beats. The homogeneous linewidth of these materials at 15 K results from electronic dephasing in \ensuremath{\sim}85 fs, approximately half of which is due to acoustic Phonon modes. Contributions from acoustic Phonons dominate the homogeneous linewidth at room temperature.
Xu Wei - One of the best experts on this subject based on the ideXlab platform.
-
photoinduced coherent acoustic Phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x ray pulses
Applied Physics Letters, 2017Co-Authors: Bingbing Zhang, Jian Liu, Xu Wei, Darui Sun, Q J Jia, Ye TaoAbstract:We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 film by femtosecond X-ray diffraction using a laser plasma-based X-ray source. The ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by photoinduced quasiparticles (QPs). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs are charge neutral excitons. Mapping the Phonon propagation and correlating its dynamics with the QP by ultrafast X-ray diffraction (UXRD) establish a powerful way to study electron-Phonon coupling and uncover the exotic physics in strongly correlated systems under nonequilibrium conditions.We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 film by femtosecond X-ray diffraction using a laser plasma-based X-ray source. The ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by photoinduced quasiparticles (QPs). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs ar...
-
photoinduced coherent acoustic Phonon dynamics inside mott insulator sr2iro4 films observed by femtosecond x ray pulses
arXiv: Atomic and Molecular Clusters, 2017Co-Authors: Bingbing Zhang, Jian Liu, Xu Wei, Darui Sun, Q J Jia, Ye TaoAbstract:We investigate the transient photoexcited lattice dynamics in a layered perovskite Mott insulator Sr2IrO4 by femtosecond X-ray diffraction using a laser plasma-based X-ray source. Ultrafast structural dynamics of Sr2IrO4 thin films are determined by observing the shift and broadening of the (0012) Bragg diffraction after excitation by 1.5 eV and 3.0 eV pump photons for films with different thicknesses. The observed transient lattice response can be well interpreted as a distinct three-step dynamics due to the propagation of coherent acoustic Phonons generated by the photoinduced quasiparticles (QP). Employing a normalized Phonon propagation model, we found that the photoinduced angular shifts of the Bragg peak collapse into a universal curve after introducing a normalized coordinates to account for different thicknesses and pump photon energies, pinpointing the origin of the lattice distortion and its early evolution. In addition, a transient photocurrent measurement indicates that the photoinduced QPs are charge neutral excitons. Mapping the Phonon propagation and correlating its dynamics with the QP by ultrafast X-ray diffraction (UXRD) establish a powerful way to study electron-Phonon coupling and uncover the exotic physics in strongly correlated systems under nonequilibrium conditions.
