R. Coldea

activity

19972026

most citedQuantum criticality in an Ising chain: experimental evidence for emergent E8 symmetry

734 citations · 9.4k across the 85 of their papers we have counts for

collaborators

82 papers

cond-mat.str-el2026

Magnetic Phase Diagrams and Spin Hamiltonian of Monoclinic $α$ -RuCl $_{3}$ from Angle-Dependent Torque Studies

Daniel Antoniou, Danrui Ni, John S. Pearce +3

The layered honeycomb $α$ -RuCl $_{3}$ has been much explored as a candidate to display unconventional cooperative magnetism between spin-orbit entangled $j_{eff} = 1/2$ Ru $^{3 +}$ ma…

cond-mat.str-el2026

Angular Modulations in Magnetic Torque Induced by Phase Transitions in the Triangular Supersolid $2 H$ -AgNiO $_{2}$

John S. Pearce, Zeyu Ma, Alimamy Bangura +4

Easy-axis frustrated triangular lattice antiferromagnets provide an important playground for stabilising a wide range of exotic magnetic phases. The delafossite $2 H$ -AgNiO $_{2}$ offe…

cond-mat.str-el2026

Field-tuned incommensurate fan phase in an Ising-like triangular antiferromagnet

D. Flavián, R. Okuma, P. Manuel +3

Using single-crystal neutron diffraction we report the observation of a field-tuned incommensurate phase in a field range just below magnetization saturation in the Ising-like tria…

cond-mat.str-el2025★ 7 cited

From continuum excitations to sharp magnons via transverse magnetic field in the spin-1/2 Ising-like triangular lattice antiferromagnet Na2BaCo(PO4)2

Leonie Woodland, Ryutaro Okuma, J. Ross Stewart +2

We report high-resolution inelastic neutron scattering measurements of the excitation spectrum in large single crystals of the spin-1/2 triangular lattice Ising-like antiferromagne…

cond-mat.str-el2024

Origin of the insulating state in the Kitaev candidate Cu $_{2}$ IrO $_{3}$

Ying Li, Roger D. Johnson, Yogesh Singh +2

Through a combination of crystal symmetry analysis and density functional theory calculations we unveil a possible microscopic origin of the unexpected insulating behavior reported…

cond-mat.str-el2024

Selective synthesis and crystal chemistry of candidate rare earth Kitaev materials: honeycomb and hyperhoneycomb Na $_{2}$ PrO $_{3}$

Ryutaro Okuma, Kylie MacFarquharson, Radu Coldea

Rare earth oxides have attracted interest as a platform for studying frustrated magnetism arising from bond dependent anisotropic interactions. Ordered rock salt compounds Na $_{2}$ Pr…

Magnetic Phase Diagrams and Spin Hamiltonian of Monoclinic α-RuCl3​ from Angle-Dependent Torque Studies

Angular Modulations in Magnetic Torque Induced by Phase Transitions in the Triangular Supersolid 2H-AgNiO2​

Field-tuned incommensurate fan phase in an Ising-like triangular antiferromagnet

From continuum excitations to sharp magnons via transverse magnetic field in the spin-1/2 Ising-like triangular lattice antiferromagnet Na2BaCo(PO4)2

Origin of the insulating state in the Kitaev candidate Cu2​IrO3​

Selective synthesis and crystal chemistry of candidate rare earth Kitaev materials: honeycomb and hyperhoneycomb Na2​PrO3​

Magnetic Phase Diagrams and Spin Hamiltonian of Monoclinic $α$ -RuCl $_{3}$ from Angle-Dependent Torque Studies

Angular Modulations in Magnetic Torque Induced by Phase Transitions in the Triangular Supersolid $2 H$ -AgNiO $_{2}$

Origin of the insulating state in the Kitaev candidate Cu $_{2}$ IrO $_{3}$

Selective synthesis and crystal chemistry of candidate rare earth Kitaev materials: honeycomb and hyperhoneycomb Na $_{2}$ PrO $_{3}$