Jacques Ollivier

activity

20102026

most citedMagnetoelastic excitations in the pyrochlore spin liquid Tb

_{2}

_{2}

_{7}

103 citations · 310 across the 11 of their papers we have counts for

collaborators

11 papers

cond-mat.str-el2026

Topological band structure of excitons in octochlore KTb $_{3}$ F $_{10}$ : an analog of the Luttinger Semimetal

Olivier Demortier, Françoise Damay, Paul McClarty +3

Understanding the symmetry and topology of band structures in crystalline solids has been among the defining themes of a generation of condensed matter physicists, with implication…

cond-mat.str-el2021★ 5 cited

LT-scaling in depleted quantum spin ladders

Stanislaw Galeski, Kirill Yu. Povarov, Dominic Blosser +5

Using a combination of neutron scattering, calorimetry, Quantum Monte Carlo (QMC) simulations and analytic results we uncover confinement effects in depleted, partially magnetized…

cond-mat.str-el2018★ 8 cited

Spin waves near the edge of halogen substitution induced magnetic order in Ni(Cl $_{1 - x}$ Br $_{x}$ ) $_{2}$ $\cdot$ 4SC(NH $_{2}$ ) $_{2}$

A. Mannig, K. Yu. Povarov, J. Ollivier +1

We report an inelastic neutron scattering study of magnetic excitations in a quantum paramagnet driven into a magnetically ordered state by chemical substitution, namely Ni(Cl$_{1-…

cond-mat.str-el2017★ 17 cited

Doping-induced redistribution of magnetic spectral weight in substituted hexaborides Ce $_{1 - x}$ La $_{x}$ B $_{6}$ and Ce $_{1 - x}$ Nd $_{x}$ B $_{6}$

S. E. Nikitin, P. Y. Portnichenko, A. V. Dukhnenko +6

We investigate the doping-induced changes in the electronic structure of CeB $_{6}$ on a series of substituted Ce $_{1 - x} R_{x}$ B $_{6}$ samples ( $R$ = La, Nd) using diffuse neutron scatteri…

cond-mat.str-el2017★ 11 cited

Quantum criticality in a three dimensional spin system at zero field and pressure

K. Yu. Povarov, A. Mannig, G. Perren +4

We report spontaneous appearance of antiferromagnetic order in a model gapped quantum paramagnet Ni(Cl $_{1 - x}$ Br $_{x}$ ) $_{2}$ $\cdot$ 4SC(NH $_{2}$ ) $_{2}$ induced by a change in bromine conce…

cond-mat.str-el2016★ 19 cited

Emergent interacting spin islands in a depleted strong-leg Heisenberg ladder

D. Schmidiger, K. Yu. Povarov, S. Galeski +5

Properties of the depleted Heisenberg spin ladder material series (C $_{7}$ H $_{10}$ N) $_{2}$ Cu $_{1 - z}$ Zn $_{z}$ Br $_{4}$ have been studied by the combination of magnetic measurements and neu…

cond-mat.str-el2015★ 19 cited

Dynamics of a bond-disordered $S = 1$ quantum magnet near $z = 1$ criticality

K. Yu. Povarov, E. Wulf, D. Hüvonen +3

Neutron scattering is used to study NiCl $_{2 - 2 x}$ Br $_{2 x} \cdot$ 4SC(NH $_{2}$ ) $_{2}$ , $x = 0.06$ , a bond-disordered modification of the well-known gapped $S = 1$ antiferromagnetic quantum sp…

cond-mat.str-el2014★ 48 cited

Order by Disorder and Energetic Selection of the Ground State in the XY Pyrochlore Antiferromagnet Er2Ti2O7. An Inelastic Neutron Scattering Study

S. Petit, J. Robert, S. Guitteny +6

Examples of materials where an "order by disorder" mechanism is at play to select a particular ground state are scarce. It has recently been proposed, however, that the antiferroma…

cond-mat.str-el2014★ 28 cited

Magneto- to electro-active transmutation of spin waves in ErMnO3

Laura Chaix, Sophie De Brion, Sylvain Petit +10

The low energy dynamical properties of the multiferroic hexagonal perovskite ErMnO3 have been studied by inelastic neutron scattering as well as terahertz and far infrared spectros…

cond-mat.str-el2013★ 103 cited

Magnetoelastic excitations in the pyrochlore spin liquid Tb $_{2}$ Ti $_{2}$ O $_{7}$

T. Fennell, M. Kenzelmann, B. Roessli +9

At low temperatures, Tb $_{2}$ Ti $_{2}$ O $_{7}$ enters a spin liquid state, despite expectations of magnetic order and/or a structural distortion. Using neutron scattering, we have discover…

cond-mat.str-el2010★ 52 cited

Parity Broken Chiral Spin Dynamics in Ba $_{3}$ NbFe $_{3}$ Si $_{2}$ O $_{14}$

Mickael Loire, Virginie Simonet, Sylvain Petit +9

The spin wave excitations emerging from the chiral helically modulated 120 $^{\circ}$ magnetic order in a langasite Ba $_{3}$ NbFe $_{3}$ Si $_{2}$ O $_{14}$ enantiopure crystal were investigate…

Topological band structure of excitons in octochlore KTb3​F10​: an analog of the Luttinger Semimetal

LT-scaling in depleted quantum spin ladders

Spin waves near the edge of halogen substitution induced magnetic order in Ni(Cl1−x​Brx​)2​⋅4SC(NH2​)2​

Doping-induced redistribution of magnetic spectral weight in substituted hexaborides Ce1−x​Lax​B6​ and Ce1−x​Ndx​B6​