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- W2024303764 abstract "We report lattice-dynamical measurements, made using neutron inelastic-scattering methods, of the relaxor perovskite ${text{PbMg}}_{1/3}{text{Nb}}_{2/3}{text{O}}_{3}$ (PMN) at momentum transfers near the edge of the Brillouin zone. Unusual ``columns'' of phonon scattering that are localized in momentum, but extended in energy, are seen at both high-symmetry points along the zone edge: ${stackrel{Pvec}{Q}}_{R}={frac{1}{2},frac{1}{2},frac{1}{2}}$ and ${stackrel{Pvec}{Q}}_{M}={frac{1}{2},frac{1}{2},0}$. These columns soften at $ensuremath{sim}400text{ }text{K}$ which is similar to the onset temperature of the zone-center diffuse scattering, indicating a competition between ferroelectric and antiferroelectric distortions. We propose a model for the atomic displacements associated with these phonon modes that is based on a combination of structure factors and group theoretical analysis. This analysis suggests that the scattering is not from tilt modes (rotational modes of oxygen octahedra), but from zone-boundary optic modes that are associated with the displacement of ${text{Pb}}^{2+}$ and ${text{O}}^{2ensuremath{-}}$ ions. Whereas similar columns of scattering have been reported in metallic and (less commonly) molecular systems, they are unusual in insulating materials, particularly in ferroelectrics; therefore, the physical origin of this inelastic feature in PMN is unknown. We speculate that the underlying disorder contributes to this unique anomaly." @default.
- W2024303764 created "2016-06-24" @default.
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- W2024303764 date "2009-06-10" @default.
- W2024303764 modified "2023-10-18" @default.
- W2024303764 title "Soft phonon columns on the edge of the Brillouin zone in the relaxor<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>PbMg</mml:mtext></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Nb</mml:mtext></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>/</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mtext>O</mml:mtext><mml:mn>3</mml:mn></mml:…" @default.
- W2024303764 cites W114577395 @default.
- W2024303764 cites W1502178732 @default.
- W2024303764 cites W1511151640 @default.
- W2024303764 cites W1574079858 @default.
- W2024303764 cites W1609252041 @default.
- W2024303764 cites W1609267921 @default.
- W2024303764 cites W1613000518 @default.
- W2024303764 cites W1641167415 @default.
- W2024303764 cites W1659661129 @default.
- W2024303764 cites W1662782820 @default.
- W2024303764 cites W1664866377 @default.
- W2024303764 cites W1669051107 @default.
- W2024303764 cites W1670346343 @default.
- W2024303764 cites W1792910405 @default.
- W2024303764 cites W1841050040 @default.
- W2024303764 cites W1966295428 @default.
- W2024303764 cites W1967239629 @default.
- W2024303764 cites W1972036502 @default.
- W2024303764 cites W1974207150 @default.
- W2024303764 cites W1976146966 @default.
- W2024303764 cites W1983988858 @default.
- W2024303764 cites W1984487091 @default.
- W2024303764 cites W1985003983 @default.
- W2024303764 cites W1986798405 @default.
- W2024303764 cites W1988220602 @default.
- W2024303764 cites W1991613291 @default.
- W2024303764 cites W1993970988 @default.
- W2024303764 cites W1995008795 @default.
- W2024303764 cites W1995077328 @default.
- W2024303764 cites W1997922589 @default.
- W2024303764 cites W1999907309 @default.
- W2024303764 cites W2006003838 @default.
- W2024303764 cites W2008867996 @default.
- W2024303764 cites W2011611624 @default.
- W2024303764 cites W2018450780 @default.
- W2024303764 cites W2018700227 @default.
- W2024303764 cites W2021687429 @default.
- W2024303764 cites W2022061828 @default.
- W2024303764 cites W2028876621 @default.
- W2024303764 cites W2030784827 @default.
- W2024303764 cites W2034692712 @default.
- W2024303764 cites W2035452016 @default.
- W2024303764 cites W2036199585 @default.
- W2024303764 cites W2038282051 @default.
- W2024303764 cites W2038574448 @default.
- W2024303764 cites W2040482238 @default.
- W2024303764 cites W2044093972 @default.
- W2024303764 cites W2047683088 @default.
- W2024303764 cites W2048835496 @default.
- W2024303764 cites W2050873565 @default.
- W2024303764 cites W2050880185 @default.
- W2024303764 cites W20520734 @default.
- W2024303764 cites W2055076277 @default.
- W2024303764 cites W2056657089 @default.
- W2024303764 cites W2057513159 @default.
- W2024303764 cites W2063332538 @default.
- W2024303764 cites W2064250922 @default.
- W2024303764 cites W2067467290 @default.
- W2024303764 cites W2068128013 @default.
- W2024303764 cites W2068583513 @default.
- W2024303764 cites W2077199193 @default.
- W2024303764 cites W2079687883 @default.
- W2024303764 cites W2082746996 @default.
- W2024303764 cites W2083058397 @default.
- W2024303764 cites W2084543150 @default.
- W2024303764 cites W2085117196 @default.
- W2024303764 cites W2085475881 @default.
- W2024303764 cites W2085677397 @default.
- W2024303764 cites W2092890363 @default.
- W2024303764 cites W2092914300 @default.
- W2024303764 cites W2094050936 @default.
- W2024303764 cites W2103279820 @default.
- W2024303764 cites W2103660116 @default.
- W2024303764 cites W2105459924 @default.
- W2024303764 cites W2111887934 @default.
- W2024303764 cites W2115659021 @default.
- W2024303764 cites W2129983833 @default.
- W2024303764 cites W2165262520 @default.
- W2024303764 cites W2169466393 @default.
- W2024303764 cites W2592979387 @default.
- W2024303764 cites W288263308 @default.
- W2024303764 cites W3098493917 @default.
- W2024303764 cites W3098607768 @default.
- W2024303764 cites W3099709037 @default.
- W2024303764 doi "https://doi.org/10.1103/physrevb.79.224301" @default.