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Origin of the spin pseudogap in a Ni-doped Heisenberg AF spin-1/2 chain
Heisenberg antiferromagnetic (HAF) S = ½ chains are famous for their gapless magnetic excitation spectrum. Interestingly, in SrCuO2 and Sr2CuO3, which are some of the best... -
Evolve of the Spin Waves in Rb0.8Fe1.6Se2 at High Temperature
The newly discovered AxFe2-ySe2 (A=K,Rb,Cs) compounds have attracted great interests because of their parent compounds are insulators instead of being metallic [2-6].... -
Explore the spectrum of spin excitations in non-superconducting BaFe1.8Ni0.1C...
Recently, our neutron scattering experiments on electron doped BaFe2-xNixAs2 and hole doped Ba1-xKxFe2As2 suggest that the presence of both high-energy spin excitations giving... -
Magnons in Co2FeSi
Heusler compounds are of great interest for various applications, since they are predicted to be half-metallic materials with full spin polarization of ~6.0 μB. However,... -
Neutron scattering study on the honeycomb Heisenberg-Kitaev magnet alpha-RuCl3
The experimental realization of a Heisenberg-Kitaev model on the honeycomb lattice has been a major topic in a condensed matter physics, because the model predict a novel... -
Effect of electron doping on the magnetic dynamics of the d^4 Mott insulator ...
Oxides containing heavy transition-metal ions with four d electrons (d^4) surrounded by an octahedron of oxygen ions have recently been predicted to display a novel type of... -
Disentangling magnetism and phonons in magnetostrictive CoFe2O4:
CoFe2O4 is a highly magnetostrictive material with a very high magnetic ordering temperature near 900 K. Preliminary triple-axis work has found sharp acoustic phonons, but... -
CEF investigation to clarify dual Kondo temperature in a Ce clathrate
Type-I clathrates are of active interest for thermoelectric applications at temperatures above room temperature. This is mostly due to rattling modes of the guest atoms in these... -
Inelastic magnetic excitations in NaFe0.95Co0.05As (Tc~17 K)
Though NaFeAs shares the same crystallographic structure with LiFeAs, there are many different aspects between them. We would like to compare the magnetic excitation in it with... -
Magnetic interactions in honeycomb iridates Na2IrO3
We propose to study the magnetic excitation spectrum of Na2IrO3 with inelastic neutron scattering. Na2IrO3 is a promising candidate to realize Kitaev interaction. By mapping out... -
Magnetic Excitations in SrRuO3
SrRuO3 is particularly interesting as it is the only simple Ruthenate that exhibits ferromagnetic order at ambient conditions, which still is a rare phenomenon in the broader... -
Proton diffusion in zirconate perovskites investigated by QENS
The growth in both global demand for energy and fossil-fuel related environmental issues drive research on alternative fuel sources. Solid oxide fuel cells, which can operate on... -
Simultaneous SANS and modulated SESANS to resolve growth of surfactant-templa...
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Low energy magnetic excitations on a new triangular-lattice antiferromagnet
Given the controversy about the magnetic ground state of the recently well studied triangular-lattice antiferromagnet (TLA) YbMgGaO4 due to Mg2+/Ga3+ disorder, we have... -
Testing effectiveness of new oscillating radial collimator on Merlin using Mn...
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Study of the Hybridization Gap in the Topological Insulator YbB6
Topological insulators (TIs) are a new quantum state of matter which have bulk insulation but topologically protected metallic surface states. Initially, the TI state was... -
NTC2015
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YTO Ei=120meV 450Hz RRM Gd T=30K psi=20 ccr_rot=109.43
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Probing possible Dirac magnons in collinear antiferromagnets
Topological state of matter remains one of the central topics in condensed matter physics since decades ago. Take graphene as an example, the electron bands are linear and... -
High precision measurements of the spin wave dispersion in Yttrium Iron Garnet
Yttrium Iron Garnet (YIG) is a material with extremely wide ranging applications, having the narrowest ferromagnetic resonance linewidth of any known material. Despite decades...
