scholarly journals Magnetic Excitations in the Kondo Insulator SmB6

2014 ◽  
Vol 70 (a1) ◽  
pp. C1542-C1542
Author(s):  
Collin Broholm ◽  
Wesley Fuhrman ◽  
Jon Leiner ◽  
Garrett Granroth ◽  
Mark Lumsden ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Inelastic Neutron Scattering ◽  
Resonant Mode ◽  
Inelastic Neutron ◽  
Department Of Energy ◽  
Scattering Data ◽  
Wide Energy Range ◽  
Magnetic Excitations ◽  
Kondo Insulator ◽  
Wide Energy

SmB6 is a Kondo insulator with surface conductivity that was recently proposed to be topologically protected. I shall describe an inelastic neutron scattering experiment probing magnetic excitations over a wide energy range in a single crystal of SmB6 at low temperatures. Consistent with previous findings by Alekseev et al., a resonant mode near 14 meV is observed at low temperatures near the X and R points of the Brillouin zone. The overall dispersion of the excitation is less than 1 meV. The intensity falls of rapidly in higher Brillouin zones as the 5d electron form factor. The comprehensive inelastic scattering data provide indirect information about the underlying, putative topological, hybridized band structure. Work at IQM was supported by the U.S. Department of Energy, office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-FG02-08ER46544. Work at ORNL was supported by LDRD 06576.

Inelastic neutron scattering investigation of magnetic excitations in the spin-Peierls ground state of

2009 ◽  
Vol 404 (3-4) ◽  
pp. 537-540 ◽  
Author(s):  
Pascale Foury-Leylekian ◽  
Sylvain Petit ◽  
Claude Coulon ◽  
Bernard Hennion ◽  
Alec Moradpour ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Ground State ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Magnetic Excitations

scholarly journals Magnetic excitations in multiferroicLuMnO3studied by inelastic neutron scattering

2010 ◽  
Vol 82 (18) ◽  
Author(s):  
H. J. Lewtas ◽  
A. T. Boothroyd ◽  
M. Rotter ◽  
D. Prabhakaran ◽  
H. Müller ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Magnetic Excitations

Polymer Relaxational Dynamics Associated With Ionic Conduction in Confined Geometry

2002 ◽  
Vol 756 ◽  
Author(s):  
J.-M. Zanotti ◽  
L. J. Smith ◽  
E. Giannelis ◽  
P. Levitz ◽  
D. L. Price ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Ionic Conduction ◽  
Inelastic Neutron Scattering ◽  
Mean Square Displacement ◽  
Lattice Relaxation ◽  
Inelastic Neutron ◽  
Spin Lattice Relaxation ◽  
Scattering Data ◽  
Melting Transition ◽  
Time Data

ABSTRACTResults of a quasi-elastic incoherent neutron scattering study of the influence of confinement on polyethylene oxide (PEO) and (PEO)8Li+[(CF3SO2)2N]- (or (POE)8LiTFSI) dynamics are presented. The confining media is Vycor, a silica based hydrophilic porous glass. We observe a strong slowing down of the bulk polymer dynamics under presence of Li salt. The confinement also affects dramatically the apparent mean-square displacement of the polymer. As supported by DSC measurements, the PEO melting transition at 335 K is strongly attenuated under confinement, suggesting that confinement modifies the global structure of the system, increasing the fraction of amorphous PEO by respect to crystalline phase. Local relaxational PEO dynamics is successfully described by the DLM (Dejean-Laupretre-Monnerie) model usually used to interpret NMR spin-lattice relaxation time data. The scattering vector dependence of the correlation times deduced from inelastic neutron scattering data is found to obey a power-law dependence. DSC and preliminary ionic conduction measurements are also presented.

Simulations of hydrogen sorption in rht-MOF-1: identifying the binding sites through explicit polarization and quantum rotation calculations

2014 ◽  
Vol 2 (7) ◽  
pp. 2088-2100 ◽  
Author(s):  
Tony Pham ◽  
Katherine A. Forrest ◽  
Adam Hogan ◽  
Keith McLaughlin ◽  
Jonathan L. Belof ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Binding Sites ◽  
Inelastic Neutron Scattering ◽  
Metal Organic Framework ◽  
Inelastic Neutron ◽  
Scattering Data ◽  
Grand Canonical Monte Carlo ◽  
Metal Organic ◽  
Grand Canonical

Grand canonical Monte Carlo simulations of H2 sorption were performed in the metal–organic framework rht-MOF-1. The binding sites were revealed by combining simulation and inelastic neutron scattering data.

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