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Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO4

(2013)

Authors:

T Lancaster, SR Giblin, G Allodi, S Bordignon, M Mazzani, R De Renzi, PG Freeman, PJ Baker, FL Pratt, P Babkevich, SJ Blundell, AT Boothroyd, JS Moeller, D Prabhakaran
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Bifurcated Polarization Rotation in Bismuth‐Based Piezoelectrics

Advanced Functional Materials Wiley 23:2 (2013) 185-190

Authors:

Dean S Keeble, Emma R Barney, David A Keen, Matthew G Tucker, Jens Kreisel, Pam A Thomas
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Terahertz Frequency Electromagnon and Magnon Modes in Multiferroic Cupric Oxide

Institute of Electrical and Electronics Engineers (IEEE) (2013) 1-1

Authors:

Samuel PP Jones, S Gaw, D Prabhakaran, AT Boothroyd, James Lloyd-Hughes
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Dynamical matrix diagonalization for the calculation of dispersive excitations (vol 24, 213201, 2012)

JOURNAL OF PHYSICS-CONDENSED MATTER 25:32 (2013) ARTN 329501

Authors:

Martin Rotter, Manh Duc Le, Andrew T Boothroyd, Jesus Angel Blanco
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Ground state in a half-doped manganite distinguished by neutron spectroscopy

Physical Review Letters 109:23 (2012)

Authors:

GE Johnstone, TG Perring, O Sikora, D Prabhakaran, AT Boothroyd

Abstract:

We have measured the spin-wave spectrum of the half-doped bilayer manganite Pr(Ca,Sr)2Mn2O7 in its spin, charge, and orbital ordered phase. The measurements, which extend throughout the Brillouin zone and cover the entire one-magnon spectrum, are compared critically with spin-wave calculations for different models of the electronic ground state. The data are described very well by the Goodenough model, which has weakly interacting ferromagnetic zig-zag chains in the CE-type arrangement. A model that allows ferromagnetic dimers to form within the zigzags is inconsistent with the data. The analysis conclusively rules out the strongly bound dimer (Zener polaron) model. © 2012 American Physical Society.
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