Magnetotransport of Sm2Ir2O7 across the pressure-induced quantum-critical phase boundary
npj Quantum Materials Springer Nature 9:1 (2024) 17
Weyl metallic state induced by helical magnetic order
npj Quantum Materials Springer Nature 9:1 (2024) 7
Abstract:
In the rapidly expanding field of topological materials there is growing interest in systems whose topological electronic band features can be induced or controlled by magnetism. Magnetic Weyl semimetals, which contain linear band crossings near the Fermi level, are of particular interest owing to their exotic charge and spin transport properties. Up to now, the majority of magnetic Weyl semimetals have been realized in ferro- or ferrimagnetically ordered compounds, but a disadvantage of these materials for practical use is their stray magnetic field which limits the minimum size of devices. Here we show that Weyl nodes can be induced by a helical spin configuration, in which the magnetization is fully compensated. Using a combination of neutron diffraction and resonant elastic x-ray scattering, we find that below TN = 14.5 K the Eu spins in EuCuAs develop a planar helical structure which induces two quadratic Weyl nodes with Chern numbers C = ±2 at the A point in the Brillouin zone.Excitations of quantum Ising chain CoNb2O6 in low transverse field: Quantitative description of bound states stabilized by off-diagonal exchange and applied field
Physical Review B American Physical Society (APS) 108:18 (2023) 184417
Tuning the confinement potential between spinons in the Ising chain compound CoNb2O6 using longitudinal fields and quantitative determination of the microscopic Hamiltonian
Physical Review B American Physical Society (APS) 108:18 (2023) 184416
Topological materials for helicity-dependent THz emission
2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) IEEE (2023) 1-2