The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Yao Wang - One of the best experts on this subject based on the ideXlab platform.
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probing light driven quantum materials with ultrafast resonant inelastic X Ray Scattering
Communications in Physics, 2020Co-Authors: Matteo Mitrano, Yao WangAbstract:Ultrafast optical pulses are an increasingly important tool for controlling quantum materials and triggering novel photo-induced phase transitions. Understanding these dynamic phenomena requires a probe sensitive to spin, charge, and orbital degrees of freedom. Time-resolved resonant inelastic X-Ray Scattering (trRIXS) is an emerging spectroscopic method, which responds to this need by providing unprecedented access to the finite-momentum fluctuation spectrum of photoeXcited solids. In this Perspective, we briefly review state-of-the-art trRIXS eXperiments on condensed matter systems, as well as recent theoretical advances. We then describe future research opportunities in the conteXt of light control of quantum matter. Interrogating emergent nonequilibrium phenomena in light-driven quantum materials requires probing microscopic spin, charge and orbital eXcitations at ultrafast timescales. In this Perspective, time-resolved resonant inelastic X-Ray Scattering is discussed as a nascent method to investigate photoinduced states of matter.
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time resolved resonant inelastic X Ray Scattering in a pumped mott insulator
Physical Review B, 2020Co-Authors: Yao Wang, T P Devereaux, Yuan Chen, Chunjing Jia, Brian MoritzAbstract:Collective eXcitations contain rich information about photoinduced transient states in correlated systems. In a Mott insulator, charge degrees of freedom are frozen, but can be activated by photodoping. The energy-momentum distribution of the charge eXcitation spectrum reflects the propagation of charge degrees of freedom, and provides information about the interplay among various intertwined instabilities on the time scale set by the pump. To reveal charge eXcitations out of equilibrium, we simulate time-resolved X-Ray absorption and resonant inelastic X-Ray Scattering using a Hubbard model. After pumping, the former resolves photodoping, while the latter characterizes the formation, dispersion, weight, and nonlinear effects of collective eXcitations. Intermediate-state information from time-resolved resonant inelastic X-Ray Scattering (trRIXS) can be used to decipher the origin of these eXcitations, including bimagnons, Mott-gap eXcitations, doublon and single-electron in-gap states, and anti-Stokes relaXation during an ultrafast pump. This paper provides a theoretical foundation for eXisting and future trRIXS eXperiments.
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theory for time resolved resonant inelastic X Ray Scattering
Physical Review B, 2019Co-Authors: Yuan Chen, Yao Wang, Chunjing Jia, Brian Moritz, A M Shvaika, J K FreericksAbstract:How do we map collective eXcitations with time, momentum, and energy resolution? Development of time-resolved resonant inelastic X-Ray Scattering (tr-RIXS) shows promise. Here, the authors present a theory for the tr-RIXS cross section, and as a proof of principle, they apply the theory to single-band models to elucidate the dynamics of particle-hole eXcitations. This work provides a crucial bridge for understanding how eXcitations from complicated phases manifest in time-resolved resonant Scattering eXperiments.
Yuan Chen - One of the best experts on this subject based on the ideXlab platform.
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time resolved resonant inelastic X Ray Scattering in a pumped mott insulator
Physical Review B, 2020Co-Authors: Yao Wang, T P Devereaux, Yuan Chen, Chunjing Jia, Brian MoritzAbstract:Collective eXcitations contain rich information about photoinduced transient states in correlated systems. In a Mott insulator, charge degrees of freedom are frozen, but can be activated by photodoping. The energy-momentum distribution of the charge eXcitation spectrum reflects the propagation of charge degrees of freedom, and provides information about the interplay among various intertwined instabilities on the time scale set by the pump. To reveal charge eXcitations out of equilibrium, we simulate time-resolved X-Ray absorption and resonant inelastic X-Ray Scattering using a Hubbard model. After pumping, the former resolves photodoping, while the latter characterizes the formation, dispersion, weight, and nonlinear effects of collective eXcitations. Intermediate-state information from time-resolved resonant inelastic X-Ray Scattering (trRIXS) can be used to decipher the origin of these eXcitations, including bimagnons, Mott-gap eXcitations, doublon and single-electron in-gap states, and anti-Stokes relaXation during an ultrafast pump. This paper provides a theoretical foundation for eXisting and future trRIXS eXperiments.
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theory for time resolved resonant inelastic X Ray Scattering
Physical Review B, 2019Co-Authors: Yuan Chen, Yao Wang, Chunjing Jia, Brian Moritz, A M Shvaika, J K FreericksAbstract:How do we map collective eXcitations with time, momentum, and energy resolution? Development of time-resolved resonant inelastic X-Ray Scattering (tr-RIXS) shows promise. Here, the authors present a theory for the tr-RIXS cross section, and as a proof of principle, they apply the theory to single-band models to elucidate the dynamics of particle-hole eXcitations. This work provides a crucial bridge for understanding how eXcitations from complicated phases manifest in time-resolved resonant Scattering eXperiments.
Brian Moritz - One of the best experts on this subject based on the ideXlab platform.
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time resolved resonant inelastic X Ray Scattering in a pumped mott insulator
Physical Review B, 2020Co-Authors: Yao Wang, T P Devereaux, Yuan Chen, Chunjing Jia, Brian MoritzAbstract:Collective eXcitations contain rich information about photoinduced transient states in correlated systems. In a Mott insulator, charge degrees of freedom are frozen, but can be activated by photodoping. The energy-momentum distribution of the charge eXcitation spectrum reflects the propagation of charge degrees of freedom, and provides information about the interplay among various intertwined instabilities on the time scale set by the pump. To reveal charge eXcitations out of equilibrium, we simulate time-resolved X-Ray absorption and resonant inelastic X-Ray Scattering using a Hubbard model. After pumping, the former resolves photodoping, while the latter characterizes the formation, dispersion, weight, and nonlinear effects of collective eXcitations. Intermediate-state information from time-resolved resonant inelastic X-Ray Scattering (trRIXS) can be used to decipher the origin of these eXcitations, including bimagnons, Mott-gap eXcitations, doublon and single-electron in-gap states, and anti-Stokes relaXation during an ultrafast pump. This paper provides a theoretical foundation for eXisting and future trRIXS eXperiments.
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theory for time resolved resonant inelastic X Ray Scattering
Physical Review B, 2019Co-Authors: Yuan Chen, Yao Wang, Chunjing Jia, Brian Moritz, A M Shvaika, J K FreericksAbstract:How do we map collective eXcitations with time, momentum, and energy resolution? Development of time-resolved resonant inelastic X-Ray Scattering (tr-RIXS) shows promise. Here, the authors present a theory for the tr-RIXS cross section, and as a proof of principle, they apply the theory to single-band models to elucidate the dynamics of particle-hole eXcitations. This work provides a crucial bridge for understanding how eXcitations from complicated phases manifest in time-resolved resonant Scattering eXperiments.
T P Devereaux - One of the best experts on this subject based on the ideXlab platform.
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time resolved resonant inelastic X Ray Scattering in a pumped mott insulator
Physical Review B, 2020Co-Authors: Yao Wang, T P Devereaux, Yuan Chen, Chunjing Jia, Brian MoritzAbstract:Collective eXcitations contain rich information about photoinduced transient states in correlated systems. In a Mott insulator, charge degrees of freedom are frozen, but can be activated by photodoping. The energy-momentum distribution of the charge eXcitation spectrum reflects the propagation of charge degrees of freedom, and provides information about the interplay among various intertwined instabilities on the time scale set by the pump. To reveal charge eXcitations out of equilibrium, we simulate time-resolved X-Ray absorption and resonant inelastic X-Ray Scattering using a Hubbard model. After pumping, the former resolves photodoping, while the latter characterizes the formation, dispersion, weight, and nonlinear effects of collective eXcitations. Intermediate-state information from time-resolved resonant inelastic X-Ray Scattering (trRIXS) can be used to decipher the origin of these eXcitations, including bimagnons, Mott-gap eXcitations, doublon and single-electron in-gap states, and anti-Stokes relaXation during an ultrafast pump. This paper provides a theoretical foundation for eXisting and future trRIXS eXperiments.
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resonant inelastic X Ray Scattering studies of elementary eXcitations
Reviews of Modern Physics, 2011Co-Authors: Luuk J P Ament, Michel Van Veenendaal, T P Devereaux, J P Hill, Jeroen Van Den BrinkAbstract:Resonant Inelastic X-Ray Scattering (RIXS) is an X-Ray in, X-Ray out technique that enables one to study the dispersion of eXcitations in solids. In this thesis, we investigated how various elementary eXcitations of transition metal oXides show up in RIXS spectra.
P H Bucksbaum - One of the best experts on this subject based on the ideXlab platform.
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characterizing multiphoton eXcitation using time resolved X Ray Scattering
Physical Review X, 2020Co-Authors: P H Bucksbaum, Matthew R Ware, Adi Natan, James P Cryan, James M GlowniaAbstract:Using femtosecond X-Ray Scattering, eXperiments reveal the ultrafast and ultrasmall motion of molecular iodine in response to intense laser radiation, showing that femtosecond X Rays are a powerful tool for studying laser-matter interactions.
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characterizing multiphoton eXcitation using time resolved X Ray Scattering
arXiv: Chemical Physics, 2019Co-Authors: P H Bucksbaum, Matthew R Ware, Adi Natan, James P Cryan, James M GlowniaAbstract:Molecular iodine was photoeXcited by a strong 800 nm laser, driving several channels of multiphoton eXcitation. The motion following photoeXcitation was probed using time-resolved X-Ray Scattering, which produces a Scattering map $S(Q,\tau)$. Temporal Fourier transform methods were employed to obtain a frequency-resolved X-Ray Scattering signal $\tilde{S}(Q,\omega)$. Taken together, $S(Q,\tau)$ and $\tilde{S}(Q,\omega)$ separate different modes of motion, so that mode-specific nuclear oscillatory positions, oscillation amplitudes, directions of motions, and times may be measured accurately. Molecular dissociations likewise have a distinct signature, which may be used to identify both velocities and dissociation time shifts, and also can reveal laser-induced couplings among the molecular potentials.
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characterizing dissociative motion in time resolved X Ray Scattering from gas phase diatomic molecules
Physical Review A, 2019Co-Authors: P H Bucksbaum, Matthew R Ware, James M Glownia, Noor Alsayyad, Jordan OnealAbstract:Time-resolved X-Ray Scattering (TRXS) measures internuclear separations in a molecule following laser-induced photoeXcitation. The molecular dynamics induced by the eXcitation laser may lie on one or several bound or dissociative electronic states. Time-resolved X-Ray Scattering from these states can be difficult to isolate because they generally overlap in the angle-resolved X-Ray Scattering pattern $I(X,y,\ensuremath{\tau})$, where $\ensuremath{\tau}$ is the pump-probe delay and $(X,y)$ are the physical piXel positions. Here we show how standard transform methods can isolate the dynamics from individual states. We form the temporal Fourier transform $\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{I}(X,y,\ensuremath{\omega})={\ensuremath{\int}}_{\ensuremath{-}\ensuremath{\infty}}^{+\ensuremath{\infty}}d\ensuremath{\tau}\phantom{\rule{0.16em}{0eX}}{e}^{\ensuremath{-}i\ensuremath{\omega}\ensuremath{\tau}}I(X,y,\ensuremath{\tau})$. This frequency-resolved X-Ray Scattering (FRXS) signal segregates the bound states according to their vibrational frequencies ${\ensuremath{\omega}}_{i}$ and also displays dissociative states along straight lines $\ensuremath{\omega}=vQ$, where the slope $v$ is the rate of increase of the internuclear distance and $Q$ is the momentum transfer between the incident and scattered X-Ray photon. We derive this relation and use FRXS to eXtract state-specific dynamics from eXperimental TRXS from molecular iodine following a 520-nm pump. Dynamics observed include one- and two-photon dissociation of the ${}^{1}{\mathrm{\ensuremath{\Pi}}}_{u}$ and ${}^{1}{\mathrm{\ensuremath{\Sigma}}}_{g}{}^{+}$ eXcited states and vibrational wave packets on the $B{\phantom{\rule{0.16em}{0eX}}}^{3}{\mathrm{\ensuremath{\Pi}}}_{0u}{}^{+}$ state.
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characterizing dissociative motion in time resolved X Ray Scattering from gas phase diatomic molecules
Physical Review A, 2019Co-Authors: Matthew Ware, Noor Alsayyad, James M Glownia, Jordan T Oneal, P H BucksbaumAbstract:Time-resolved X-Ray Scattering (TRXS) measures internuclear separations in a molecule following laser-induced photoeXcitation. The molecular dynamics induced by the eXcitation laser may lie on one or several bound or dissociative electronic states. TRXS from these states can be difficult to isolate because they generally overlap in the angle-resolved X-Ray Scattering pattern $I(X,y,{\tau})$, where ${\tau}$ is the pump-probe delay and $X,y$ are the physical piXel positions. Here we show how standard transform methods can isolate the dynamics from individual states. We form the temporal Fourier transform, $\tilde{I}(X,y,{\omega})$$=\int_{-\infty}^{\infty} d\tau e^{-i\omega\tau} I(X,y,\tau)$. This frequency-resolved X-Ray Scattering (FRXS) signal segregates the bound states according to their vibrational frequencies, ${\omega}_i$, and also displays dissociative states along straight lines ${\omega}=vQ$, where the slope $v$ is the rate of increase of the internuclear distance and $Q$ is the momentum transfer between the incident and scattered X-Ray photon. We derive this relation and use FRXS to eXtract state-specific dynamics from eXperimental TRXS from molecular iodine following a 520 nm pump. Dynamics observed include one- and two-photon dissociation of the $^{1}{\Pi}_{u}$ and $^{1}{\Sigma}_{g}^{+}$ eXcited states, and vibrational wave packets on the B ($^{3}{\Pi}_{0u}^{+}$)state.
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Characterizing dissociative motion in time-resolved X-Ray Scattering from gas-phase diatomic molecules
'American Physical Society (APS)', 2019Co-Authors: Ware Mr, Jm Glownia, Al-sayyad N, Jt O'neal, P H BucksbaumAbstract:Time-resolved X-Ray Scattering (TRXS) measures internuclear separations in a molecule following laser-induced photoeXcitation. The molecular dynamics induced by the eXcitation laser may lie on one or several bound or dissociative electronic states. TRXS from these states can be difficult to isolate because they generally overlap in the angle-resolved X-Ray Scattering pattern $I(X,y,{\tau})$, where ${\tau}$ is the pump-probe delay and $X,y$ are the physical piXel positions. Here we show how standard transform methods can isolate the dynamics from individual states. We form the temporal Fourier transform, $\tilde{I}(X,y,{\omega})$$=\int_{-\infty}^{\infty} d\tau e^{-i\omega\tau} I(X,y,\tau)$. This frequency-resolved X-Ray Scattering (FRXS) signal segregates the bound states according to their vibrational frequencies, ${\omega}_i$, and also displays dissociative states along straight lines ${\omega}=vQ$, where the slope $v$ is the rate of increase of the internuclear distance and $Q$ is the momentum transfer between the incident and scattered X-Ray photon. We derive this relation and use FRXS to eXtract state-specific dynamics from eXperimental TRXS from molecular iodine following a 520 nm pump. Dynamics observed include one- and two-photon dissociation of the $^{1}{\Pi}_{u}$ and $^{1}{\Sigma}_{g}^{+}$ eXcited states, and vibrational wave packets on the B ($^{3}{\Pi}_{0u}^{+}$)state.Comment: 18 pages, 9 figure
