92,295 research outputs found

    Lu, Nancy C.

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    National Taiwan University, Taiwan, BS, 1963 University of Wyoming, Laramie, Wyoming, MS, 1964 University of California, Berkeley, PhD, 1973 University of California, Berkeley, Post-doctoral Fellowship 1974https://scholarworks.sjsu.edu/erfa_bios/1355/thumbnail.jp

    Unconventional electronic Raman spectra of borocarbide superconductors

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    Borocarbide superconductors, which are thought to be conventional BCS-type superconductors, are not so conventional in several electronic Raman properties. Anisotropic gap-like features and finite scattering strength below the gap were observed for the RRNi2_2B2_2C (RR = Lu, Y) systems in our previous study. The effects of Co-doping on the 2Δ\Delta gap-like features and the finite scattering strength below and above the gap are studied in RR = Lu (B = B11^{11}) system. In superconducting states, Co-doping strongly suppresses the 2Δ\Delta peak in both B2g_{2g} and B1g_{1g} symmetries. Raman cross-section calculation which includes inelastic scattering shows a relatively good fit to the features above the 2Δ\Delta peak, while it does not fully account for the features below the peak.Comment: 2 pages, 1 figur

    Uniqueness of asymptotic cones of complete noncompact shrinking gradient Ricci solitons with Ricci curvature decay

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    We discuss an elementary consequence of the works of (1) Brett Kotschwar and Lu Wang and (2) Ovidiu Munteanu and Jiaping Wang

    Terbium-activated heavy scintillating glasses

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    Tb-activated scintillating glasses with high Ln2O3 (Ln=Gd, Y, Lu) concentration up to 40mol% have been prepared. The effects of Ln3+ ions on the density, thermal properties, transmission and luminescence properties under both UV and X-ray excitation have been investigated. The glasses containing Gd2O3 or Lu2O3 exhibit a high density of more than 6.0g/cm3. Energy transfer from Gd3+ to Tb3+ takes place in Gd-containing glass and as a result the Gd-containing glass shows a light yield 2.5 times higher than the Y-or Lu-containing glass. The Effect of the substitution of fluorine for oxygen on the optical properties was also investigated

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