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Open AccessTerahertz electric-field-driven dynamical multiferroicity in SrTiO3
The emergence of collective order in matter is among the most fundamental and intriguing phenomena in physics. In recent years, the dynamical control and creation of novel ordered states of matter not accessib...
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Article
Open AccessRehybridization dynamics into the pericyclic minimum of an electrocyclic reaction imaged in real-time
Electrocyclic reactions are characterized by the concerted formation and cleavage of both σ and π bonds through a cyclic structure. This structure is known as a pericyclic transition state for thermal reaction...
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Clocking Auger electrons
Intense X-ray free-electron lasers (XFELs) can rapidly excite matter, leaving it in inherently unstable states that decay on femtosecond timescales. The relaxation occurs primarily via Auger emission, so excit...
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Article
Open AccessSpin-current-mediated rapid magnon localisation and coalescence after ultrafast optical pum** of ferrimagnetic alloys
Sub-picosecond magnetisation manipulation via femtosecond optical pum** has attracted wide attention ever since its original discovery in 1996. However, the spatial evolution of the magnetisation is not yet ...
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Terahertz-driven phonon upconversion in SrTiO3
Direct manipulation of the atomic lattice using intense long-wavelength laser pulses has become a viable approach to create new states of matter in complex materials. Conventionally, a high-frequency vibration...
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Article
Open AccessThe origin of incipient ferroelectricity in lead telluride
The interactions between electrons and lattice vibrations are fundamental to materials behaviour. In the case of group IV–VI, V and related materials, these interactions are strong, and the materials exist nea...
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Article
Open AccessFemtosecond all-optical synchronization of an X-ray free-electron laser
Many advanced applications of X-ray free-electron lasers require pulse durations and time resolutions of only a few femtoseconds. To generate these pulses and to apply them in time-resolved experiments, synchr...
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Article
Optically enhanced coherent transport in YBa2Cu3O6.5 by ultrafast redistribution of interlayer coupling
Nonlinear optical excitation of infrared active lattice vibrations has been shown to melt magnetic or orbital orders and to transform insulators into metals. In cuprates, this technique has been used to remove...
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Chapter
THz Control in Correlated Electron Solids: Sources and Applications
Materials with strongly correlated electrons often show rich phase diagrams with dramatic differences in physical properties as do**, applied pressure, or magnetic fields are changed. Even subtle perturbatio...
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Article
Ultrafast X-ray pulse characterization at free-electron lasers
The ability to fully characterize ultrashort, ultra-intense X-ray pulses at free-electron lasers (FELs) will be crucial in experiments ranging from single-molecule imaging to extreme-timescale X-ray science. T...
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Article
Bi-directional ultrafast electric-field gating of interlayer charge transport in a cuprate superconductor
In cuprate superconductors, tunnelling between planes makes three-dimensional superconductive transport possible. However, the interlayer tunnelling amplitude is reduced when an order-parameter-phase gradient ...
