R. Schäfer

activity

20192026

_{π}

Quantum Spin Liquid Ground State in the Dipole-Octupole Pyrochlore Ce

_{2}

_{2}

_{7}

70 citations · 174 across the 9 of their papers we have counts for

collaborators

10 papers

cond-mat.str-el2026

Defect Poisoning of Quantum Spin Ice

Alaric L. Sanders, Gautam K. Naik, Jonathan N. Hallén +1

The hunt for a material realization of quantum spin ice has motivated more than two decades of experimental effort. The candidate materials inevitably contain crystal imperfections…

cond-mat.str-el2026

Observation of Dipolar Spin-ice--like Correlations in the Quantum Spin Ice Candidate Ce $_{2}$ Sn $_{2}$ O $_{7}$

Bo Yuan, M. Powell, X. Liu +9

We report diffuse scattering measurements on the dipolar-octupolar pyrochlore, Ce $_{2}$ Sn $_{2}$ O $_{7}$ , to elucidate its magnetic correlations within the correlated paramagnetic regime a…

cond-mat.str-el2024★ 4 cited

Single Crystal Diffuse Neutron Scattering Study of the Dipole-Octupole Quantum Spin Ice Candidate Ce $_{2}$ Zr $_{2}$ O $_{7}$ : No Apparent Octupolar Correlations Above $T = 0.05$ K

E. M. Smith, R. Schäfer, J. Dudemaine +8

The insulating magnetic pyrochlore Ce $_{2}$ Zr $_{2}$ O $_{7}$ has gained attention as a quantum spin ice candidate with dipole-octupole character arising from the crystal electric field gro…

cond-mat.str-el2023★ 21 cited

Quantum Spin Ice Response to a Magnetic Field in the Dipole-Octupole Pyrochlore Ce $_{2}$ Zr $_{2}$ O $_{7}$

E. M. Smith, J. Dudemaine, B. Placke +17

We report new heat capacity measurements on single crystal Ce $_{2}$ Zr $_{2}$ O $_{7}$ down to $\sim$ 0.1 K in a magnetic field along the $[1, 1 ˉ, 0]$ direction. These new measurements s…

cond-mat.str-el2022★ 24 cited

Dipolar spin ice regime proximate to an all-in-all-out Néel ground state in the dipolar-octupolar pyrochlore Ce $_{2}$ Sn $_{2}$ O $_{7}$

D. R. Yahne, B. Placke, R. Schäfer +11

The dipolar-octupolar (DO) pyrochlores, R $_{2}$ M $_{2}$ O $_{7}$ (R = Ce, Sm, Nd), are key players in the search for realizable novel quantum spin liquid (QSL) states as a large parameter s…

cond-mat.str-el2022★ 21 cited

Abundance of hard-hexagon crystals in the quantum pyrochlore antiferromagnet

Robin Schäfer, Benedikt Placke, Owen Benton +1

We propose a simple family of valence-bond crystals as potential ground states of the $S = 1/2$ and $S = 1$ Heisenberg antiferromagnet on the pyrochlore lattice. Exponentially numerous…

quant-ph2022★ 18 cited

Symmetry protected exceptional points of interacting fermions

Robin Schäfer, Jan C. Budich, David J. Luitz

Non-hermitian quantum systems can exhibit spectral degeneracies known as exceptional points, where two or more eigenvectors coalesce, leading to a non-diagonalizable Jordan block.…

cond-mat.str-el2021★ 70 cited

The case for a U(1) $_{π}$ Quantum Spin Liquid Ground State in the Dipole-Octupole Pyrochlore Ce $_{2}$ Zr $_{2}$ O $_{7}$

E. M. Smith, O. Benton, D. R. Yahne +20

The Ce $^{3 +}$ pseudospin- $\frac{1}{2}$ degrees of freedom in the pyrochlore magnet Ce $_{2}$ Zr $_{2}$ O $_{7}$ are known to possess dipole-octupole (DO) character, making it a candidate for…

cond-mat.str-el2021★ 6 cited

Magnetization process and ordering of the $S = 1/2$ pyrochlore magnet in a field

Imre Hagymási, Robin Schäfer, Roderich Moessner +1

We study the $S = 1/2$ pyrochlore Heisenberg antiferromagnet in a magnetic field. Using large scale density-matrix renormalization group (DMRG) calculations for clusters up to $128$ …

cond-mat.stat-mech2019★ 10 cited

Time-crystalline behavior in an engineered spin chain

Robin Schäfer, Götz S. Uhrig, Joachim Stolze

Time crystals appear when systems display a commensurate spontaneous breaking of the discrete time translational invariance imposed by an external periodic drive. No consensus on t…

Defect Poisoning of Quantum Spin Ice

Observation of Dipolar Spin-ice--like Correlations in the Quantum Spin Ice Candidate Ce2​Sn2​O7​

Single Crystal Diffuse Neutron Scattering Study of the Dipole-Octupole Quantum Spin Ice Candidate Ce2​Zr2​O7​: No Apparent Octupolar Correlations Above T=0.05 K

Quantum Spin Ice Response to a Magnetic Field in the Dipole-Octupole Pyrochlore Ce2​Zr2​O7​

Dipolar spin ice regime proximate to an all-in-all-out Néel ground state in the dipolar-octupolar pyrochlore Ce2​Sn2​O7​