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  • 1
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    Charge density wave modulation and gap measurements in CeTe_{3} (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-10-15
    Description: Author(s): U. Ralević, N. Lazarević, A. Baum, H.-M. Eiter, R. Hackl, P. Giraldo-Gallo, I. R. Fisher, C. Petrovic, R. Gajić, and Z. V. Popović We present a study of charge density wave (CDW) ordering in CeTe 3 at room temperature using a scanning tunneling microscope and Raman spectroscopy. Two characteristic CDW ordering wave vectors obtained from the Fourier analysis are assessed to be | c * − q | = 4.19 nm − 1 and | q | = 10.26 nm − 1 where | c * | = 2 π / c is … [Phys. Rev. B 94, 165132] Published Fri Oct 14, 2016
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Initiation of Turbulent Spots in a Laminar Boundary Layer by Rigid Falling Particulates (2007)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: A transitional laminar boundary layer is developed on a 1m wide km long flat plate in a 0.6m deep water channel with a freestream velocity of 15-50 cm/s. A particulate dispenser under computer control ejects individual particles having diameters of 1/3 delta into the free stream. The particulates are introduced with an initial velocity of U(sub infinity) in the direction of the free stream. They have differing specific gravities of 1.03-2.7 which introduces an additional non-dimensional parameter relating the time taken to traverse the boundary layer to the convective time scale. The particulates produce a wake in the upper region of the boundary layer as they sink towards the wall. Visualization data taken over the range 5 x 10(exp 4) less than Re(sub x) less than 5 x 10(exp 5) indicate that turbulent spots are produced by the disturbances due to the wake rather than by the particulates themselves. This suggests that the spot formation process in this case may be inviscid in nature and may not be strongly influenced by the presence of the wall.
    Keywords: Aerodynamics
    Type: Minnowbrook I: 1993 Workshop on End-Stage Boundary Layer Transition; 23-30; NASA/CP-2007-214667
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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