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(electron volt)
258 results
  • Ultrafast time-resolved x-ray scattering reveals diffusive charge order dynamics in La2-x Ba x CuO4. [Journal Article]
    Sci Adv 2019; 5(8):eaax3346Mitrano M, Lee S, … Abbamonte P
  • Charge order is universal among high-T c cuprates, but its relation to superconductivity is unclear. While static order competes with superconductivity, dynamic order may be favorable and even contribute to Cooper pairing. Using time-resolved resonant soft x-ray scattering at a free-electron laser, we show that the charge order in prototypical La2-x Ba x CuO4 exhibits transverse fluctuations at p…
  • Characterization of high spatial resolution lithium fluoride X-ray detectors. [Journal Article]
    Rev Sci Instrum 2019; 90(6):063702Mabey P, Albertazzi B, … Koenig M
  • The response of lithium fluoride (LiF) crystal detectors to monochromatic X-rays is measured in the multi-kilo-electron-volt range. This response, as a function of the X-ray dose, is independent of photon energy with no saturation level found. The response, as a function of the incident energy flux, is found to increase for photons of lower energy due to the differing attenuation lengths of X-ray…
  • A ten-inch manipulator (TIM) based fast-electron spectrometer with multiple viewing angles (OU-ESM). [Journal Article]
    Rev Sci Instrum 2019; 90(6):063501Habara H, Iwawaki T, … Tanaka KA
  • The measurement of angularly resolved energy distributions of mega-electron-volt electrons is important for gaining a better understanding of the interaction of ultra-intense laser pulses with plasma, especially for fast-ignition laser-fusion research. It is also crucial when evaluating the production of suprathermal (several 10-keV) electrons through laser-plasma instabilities in conventional ho…
  • Ultrafast correlated charge and lattice motion in a hybrid metal halide perovskite. [Journal Article]
    Sci Adv 2019; 5(5):eaaw5558Lan Y, Dringoli BJ, … Cooke DG
  • Hybrid organic-inorganic halide perovskites have shown remarkable optoelectronic properties, exhibiting an impressive tolerance to defects believed to originate from correlated motion of charge carriers and the polar lattice forming large polarons. Few experimental techniques are capable of directly probing these correlations, requiring simultaneous sub-millielectron volt energy and femtosecond t…
  • Aqueous Li-ion battery enabled by halogen conversion-intercalation chemistry in graphite. [Journal Article]
    Nature 2019; 569(7755):245-250Yang C, Chen J, … Wang C
  • The use of 'water-in-salt' electrolytes has considerably expanded the electrochemical window of aqueous lithium-ion batteries to 3 to 4 volts, making it possible to couple high-voltage cathodes with low-potential graphite anodes1-4. However, the limited lithium intercalation capacities (less than 200 milliampere-hours per gram) of typical transition-metal-oxide cathodes5,6 preclude higher energy …
  • Van der Waals contacts between three-dimensional metals and two-dimensional semiconductors. [Journal Article]
    Nature 2019; 568(7750):70-74Wang Y, Kim JC, … Chhowalla M
  • As the dimensions of the semiconducting channels in field-effect transistors decrease, the contact resistance of the metal-semiconductor interface at the source and drain electrodes increases, dominating the performance of devices1-3. Two-dimensional (2D) transition-metal dichalcogenides such as molybdenum disulfide (MoS2) have been demonstrated to be excellent semiconductors for ultrathin field-…
  • Chemically reversible isomerization of inorganic clusters. [Journal Article]
    Science 2019; 363(6428):731-735Williamson CB, Nevers DR, … Robinson RD
  • Structural transformations in molecules and solids have generally been studied in isolation, whereas intermediate systems have eluded characterization. We show that a pair of cadmium sulfide (CdS) cluster isomers provides an advantageous experimental platform to study isomerization in well-defined, atomically precise systems. The clusters coherently interconvert over an ~1-electron volt energy ba…
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