R. Ewings

activity

20242026

collaborators

4 papers

cond-mat.str-el2026

Quasi-one-dimensional spin excitations in the iron pnictide NaFe $_{0.53}$ Cu $_{0.47}$ As

Yifan Wang, David W. Tam, Weiyi Wang +8

Spectroscopic measurements in model one-dimensional (1D) correlated systems offer insights for understanding their two-dimensional counterparts, which include the cuprate and iron…

cond-mat.mtrl-sci2025

Low energy phonons in single crystal ZrW $_{2}$ O $_{8}$

R. A. Ewings, A. I. Duff, K. Refson +2

ZrW $_{2}$ O $_{8}$ is the prototypical example of a material exhibiting negative thermal expansion (NTE). It is now widely accepted that in ZrW $_{2}$ O $_{8}$ , and in many other framew…

cond-mat.str-el2025

Magnetic excitations and exchange parameters of a nickel chain compound PbMn $_{2}$ Ni $_{6}$ Te $_{3}$ O $_{18}$ : Neutron scattering and density functional theory studies

S. Uthayakumar, D. T. Adroja, Amit Pokhriyal +10

We have investigated the quasi-one dimensional Ni-chain compound PbMn $_{2}$ Ni $_{6}$ Te $_{2}$ O $_{18}$ using theoretical DFT calculations, inelastic neutron scattering and optical spectrosc…

cond-mat.str-el2024

Entangled orbital, spin, and ferroelectric orders in $p$ -electron magnet CsO $_{2}$

Ryota Ono, Ravi Kaushik, Sergey Artyukhin +3

Alkali superoxides differ from conventional transition metal magnets, exhibit magnetism from partially occupied oxygen molecular $I ¨ ^{*}$ -orbitals. Among them, CsO $_{2}$ stands out for…

Quasi-one-dimensional spin excitations in the iron pnictide NaFe0.53​Cu0.47​As

Low energy phonons in single crystal ZrW2​O8​

Magnetic excitations and exchange parameters of a nickel chain compound PbMn2​Ni6​Te3​O18​: Neutron scattering and density functional theory studies

Entangled orbital, spin, and ferroelectric orders in p-electron magnet CsO2​

Quasi-one-dimensional spin excitations in the iron pnictide NaFe $_{0.53}$ Cu $_{0.47}$ As

Low energy phonons in single crystal ZrW $_{2}$ O $_{8}$

Magnetic excitations and exchange parameters of a nickel chain compound PbMn $_{2}$ Ni $_{6}$ Te $_{3}$ O $_{18}$ : Neutron scattering and density functional theory studies

Entangled orbital, spin, and ferroelectric orders in $p$ -electron magnet CsO $_{2}$