Browsing Physics (Scholarly Publications) by Title
Now showing items 621-640 of 1675
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H-alpha emission lines in high-redshift quasars
(1989)Infrared spectra have been obtained of the H-alpha lines in 18 medium- to high-redshift QSOs and optical spectra taken nearly simultaneously to measure the strong UV line. It is found that the H-alpha line is redshifted ... -
Heat capacity and metal-insulator transition in Ti4O7 single crystals'
(American Physical Society, 1974)Heat-capacity and entropy changes at the metal-insulator transitions have been measured on Ti4O7 single crystals. The 130-K transition is related to a disordering of the Ti3+ and Ti4+ chains at the unit cell level. Ti3+ ... -
Heat capacity of nichel sulfide and its semimetal-metal transition
(American Physical Society, 1974)Heat-capacity measurements have been made from 5 to 330 K on NiS which shows a nonmetal-metal transition at 265 K, and on Ni0.95S which is metallic at all temperatures. The low-temperature data yield electronic specific-heat ... -
Heating and compression of a laser produced plasma in a pulsed magnetic field
(2016)A pulsed 0.3 T magnetic field was used to heat and compress a low-temperature laser produced copper plasma. The magnetic field was generated using a planar 3-turn coil positioned 10 mm above the ablation spot. The plasma ... -
HELIO The Heliophysics Integrated Observatory
(2011)Heliophysics is a new research field that explores the Sun-Solar System Connection; it requires the joint exploitation of solar, heliospheric, magnetospheric and ionospheric observations. HELIO, the Heliophysics Integrated ... -
Helium ion microscope generated nitrogen-vacancy centres in type Ib diamond
(2014)We report on position and density control of nitrogen-vacancy (NV) centres created in type Ib diamond using localised exposure from a helium ion microscope and subsequent annealing. Spatial control to <380 nm has been ... -
High Areal Capacity Battery Electrodes Enabled by Segregated Nanotube Networks
(2019)Increasing the energy storage capability of lithium-ion batteries necessitates maximization of their areal capacity. This requires thick electrodes performing at near-theoretical specific capacity. However, achievable ... -
High capacity silicon anodes enabled by MXene viscous aqueous ink
(2019)The ever-increasing demands for advanced lithium-ion batteries have greatly stimulated thequest for robust electrodes with a high areal capacity. Producing thick electrodes from a high-performance active material would ... -
High charge and discharge rate limitations in ordered macroporous li-ion battery materials
(2020)Adding porosity to battery electrodes is sometimes useful for accommodating volumetric expansion, electrolyte access to active materials, or mitigating poor high-rate performance for thicker electrodes. Ordered macroporous ... -
High field magneto-transport in two-dimensional electron gas LaAlO<inf>3</inf>/SrTiO<inf>3</inf>
(2016)The transport properties of the complex oxide LaAlO 3 /SrTiO 3 interface are investigated under a high magnetic field (55 T). Small oscillations of the magnetoresistance with altered periodicity are observed when ... -
High field magnetotransport and point contact Andreev reflection measurements on CuCr2Se4 and CuCr2Se 3Br - Degenerate magnetic semiconductor single crystals
(2014)Single crystals of the metallically degenerate fully magnetic semiconductors CuCr2Se4 and CuCr2Se3Br have been prepared by the Chemical Vapour Transport method, using either Se or Br as transport agents. The high-quality, ... -
High Performance Na-O2 Batteries and Printed Microsupercapacitors Based on Water-Processable, Biomolecule-Assisted Anodic Graphene
(2020)Integrated approaches that expedite the production and processing of graphene into useful structures and devices, particularly through simple and environmentally friendly strategies, are highly desirable in the efforts to ... -
High resolution electron energy loss spectroscopy of clean and hydrogen covered Si(001) surfaces: First principles calculations
(2012)Surface phonons, conductivities, and loss functions are calculated for reconstructed (2×1), p(2×2) and c(4×2) clean Si(001) surfaces, and (2×1) H and D covered Si(001) surfaces. Surface conductivities perpendicular to the ... -
High resolution STM imaging with oriented single crystalline tips
(APPLIED SURFACE SCIENCE, 2013)Precise knowledge of the atomic and electronic structure of scanning tunneling microscopy (STM) tips is crucial for a correct interpretation of atomically resolved STM data and an improvement of the spatial resolution. ... -
High Selectivity and Sensitivity in Chemiresistive Sensing of Co(II) Ions with Liquid-Phase Exfoliated Functionalized MoS2: A Supramolecular Approach
(2023)Chemical sensing of water contamination by heavy metal ions is key as it represents a most severe environmental problem. Liquid-phase exfoli-ated two-dimensional (2D) transition metal dichalcogenides (TMDs) are suitable ... -
High sensitivity two photon absorption microcavity autocorrelator
(2004)A GaAs?AlAs microcavity device has been used as a photodetector in an autocorrelator for measuring the temporal pulsewidth of 1.5- m optical pulses. Enhancement of the two-photon absorption photocurrent due to the ... -
High spin polarization in epitaxial films of ferrimagnetic Mn3Ga
(2011)Ferrimagnetic Mn3Ga exhibits a unique combination of low saturation magnetization (Ms=0.11 MA m−1) and high perpendicular anisotropy with a uniaxial anisotropy constant of Ku = 0.89 MJ m−3. Epitaxial c-axis films exhibit ...
