Zobrazeno 1 - 10
of 61
pro vyhledávání: '"K. B. Lyons"'
Publikováno v:
Physical Review B. 56:5213-5227
Autor:
Yoshihiro Iwasa, R. M. Fleming, J. H. Marshall, R. H. Eick, K. B. Lyons, Chang-Beom Eom, Julia M. Phillips, D. H. Rapkine, Robert C. Haddon, Arthur F. Hebard, Gordon A. Thomas
Publikováno v:
Physical Review B. 50:17740-17743
Thin-film multilayer structures with up to 20 repeat layers have been grown in a high-vacuum chamber by sequential deposition of aluminum (Al) and fullerene (${\mathrm{C}}_{60}$) onto room-temperature substrates. The periodicity of the layers is conf
Autor:
P. A. Fleury, K. B. Lyons
Publikováno v:
Ferroelectrics. 144:17-31
We review our measurements on the polarization dynamics near the dipolar glass transition in KTN, at low niobium concentration (0.9-1.2%). Measurements over a wide range of characteristic times, including Raman and Neutron scattering, Brillouin scatt
Publikováno v:
Physical Review Letters. 67:3864-3867
A recent theory of Raman scattering in the Hubbard model predicts scatteirng of ${\mathit{A}}_{2}$ symmetry arising from chiral spin fluctuations. In the doped planar cuprates, chiral spin fluctuations have been speculated to play a central role in e
Autor:
K. B. Lyons, J. F. Dillon
Publikováno v:
International Journal of Modern Physics B. :1523-1537
A complete review is given of polar Kerr rotation measurements on samples of superconducting cuprates and related materials. We discuss the details of the experimental technique we have employed to discriminate against linear polarization effects, an
Publikováno v:
Ferroelectrics. 117:321-330
A careful study of the polarization dynamics near the dipolar glass transition, utilizing both neutron and light scattering reveals a dichotomy in the behavior, on the one hand suggesting ordered domains of macroscopic extent and on the other clearly
Autor:
Arthur P. Ramirez, Lynn Schneemeyer, J. F. Dillon, J. Kwo, K. B. Lyons, G. P. Espinosa, M. McGlashan-Powell
Publikováno v:
Physical Review Letters. 64:2949-2952
We report observation of circular dichroism in reflection from various cuprate superconducting materials, including ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{2}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathit{x}}$ films, an etched ${\mathrm{YBa}}_{2}$${\mat
Publikováno v:
Physical Review B. 41:10947-10955
Photon transport in strongly scattering random media has been examined by two experimental methods in order to search for departures from diffusive transport and the approach to strong photon localization. The first method measures the evolution in t
Publikováno v:
Physical Review B. 41:7231-7234
An inelastic neutron scattering study of KTa{sub 1{minus}{ital x}}Nb{sub {ital x}}O{sub 3} ({ital x}=0.012) (KTN) shows that there is a marked softening of the zone-center optic mode with decreasing temperature. This mode reaches a nonzero minimum en
Publikováno v:
Physical Review B. 41:225-230
Raman spectra reveal spin fluctuation scattering over the energy range 0--8000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ (0--1 eV) in single crystal ${\mathrm{La}}_{2}$${\mathrm{CuO}}_{4}$ (T phase), ${\mathrm{Nd}}_{2}$${\mathrm{CuO}}_{4}$, and ${\m