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Dimensional Reduction and Frustration in the 2D Quantum Dimer Magnet BaCuSi2O6
For a decade field-tuned quantum criticality in the spin-dimer system BaCuSi2O6 has been of great interest due to an unconventional dimensional crossover at its quantum critical... -
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... -
Magnetic excitation spectrum near incipient SDW order in Nb1-xFe2+x
Our previous neutron diffraction on C14 Laves phase compounds Nb1-xFe2+x revealed thata spin-density-wave (SDW) is masking an underlying ferromagnetic (FM) quantum critical... -
High Energy Spin Excitations in Electron Overdoped NaFe0.7Ni0.3As
The interplay between magnetism and superconductivity in iron-based high-temperature superconductors are of great interest in condensed matter physics research. These two... -
Magnetic excitations in the quantum spin ice Yb2Ti2O7
We propose to carry out an inelastic neutron scattering experiment at LET to investigate the excitations in the quantum spin ice Yb2Ti2O7. In contrast to other single crystal... -
Quantum critical E/T scaling of the dynamic susceptibility in Sr3Ru2O7
Spin fluctuations of materials close to a quantum critical point (QCP) exhibit anomalous behaviors. Sr3Ru2O7 has been shown to exhibit field-induced spin density wave (SDW)... -
Magnetic excitations in a candidate magnetic XY analogue of graphene
This proposal is part of our research programme to explore the experimental manifestation of topological properties of magnetic excitations. The honeycomb ferromagnet is... -
Spin wave excitations in the 2D honeycomb ferromagnets
Graphene is the single layer of honeycomb-shaped carbon network, for which 2010 Nobel Prize in Physics was awarded thanks to its novel electronic properties. One of such... -
Investigation of magnon dynamics of rare-earth garnet Ho3Fe5O12
Rare-earth Iron garnets (RE3Fe5O12) have been in the focus of active research for the last five decades due to their fascinating properties, such as large magnetostriction,... -
Magnetic excitations in a rare earth Kitaev material
Among the intense research on quantum spin liquid states, the Kitaev model has attracted great attention. Compounds consist of honeycomb layers with strong spin-orbit coupling,... -
Spin-orbit transitions of Co3+ in LaCoO3
In our first measurement of the high energy spectrum of LaCoO3 we observed a signal which is a promising candidate for an electronic transition from the low spin ground state of... -
In search for magnon-magnon/phonon coupling in metallic triangular antiferrom...
Recent theories and experiments on two-dimensional triangular lattice antiferromagnet show that the spin dynamics of these system exhibit the rare phenomena due to high-order... -
Exotic spin excitations in a quasi one-dimensional anisotropic Heisenberg magnet
Very recently, string states have been identified for the first time in antiferromagnetic Heisenberg-Ising chain SrCo2V2O8 in longitudinal magnetic fields using high-resolution... -
Exchange interactions and spin gap in Cu2PO4OH
The mineral Libethenite, Cu2PO4OH, is an ideal system in which to study low dimensional quantum magnetism. Its magnetic behaviour is complex but is related to systems with...
