255 citations · 668 across the 22 of their papers we have counts for
22 papers
Crystal-Field Symmetry Constraints in Layered Honeycomb ErBr
Biaoyan Hu, Mingyuan Hu, Franz Demmel +3
Crystal-field symmetry restricts the ground-state Kramers doublet of ErBr to one of two classes. We show that the compressed octahedral environment selects the class with $\lan…
Disorder-induced proximate quantum spin ice phase in Pr2Sn2O7
Yi Luo, Brenden R. Ortiz, Miles J. Knudtson +8
Magnetic pyrochlores with non-Kramers rare-earth ions provide a platform for exploring emergent gauge physics and quantum spin-ice behavior, yet the influence of structural disorde…
Pulling order back from the brink of disorder: Observation of a nodal line spin liquid and fluctuation stabilized order in KIrCl
Qiaochu Wang, Alberto de la Torre, Jose A. Rodriguez-Rivera +8
Competing interactions in frustrated magnets can give rise to highly degenerate ground states from which correlated liquid-like states of matter often emerge. The scaling of this d…
Synthesis and characterization of the novel breathing pyrochlore compound Ba3Tm2Zn5O11
Lalit Yadav, Rabindranath Bag, Ramesh Dhakal +10
In this study, a novel material from the rare-earth based breathing pyrochlore family, Ba3Tm2Zn5O11, was successfully synthesized. Powder x-ray diffraction and high-resolution powd…
Anomalous continuum scattering and higher-order van Hove singularity in the strongly anisotropic S = 1/2 triangular lattice antiferromagnet
Pyeongjae Park, E. A. Ghioldi, Andrew F. May +10
The S = 1/2 triangular lattice antiferromagnet (TLAF) is a paradigmatic example of frustrated quantum magnetism. An ongoing challenge involves understanding the influence of exchan…
Phase Diagram and Spectroscopic Signatures of a Supersolid in Quantum Ising Magnet KCo(SeO)
Tong Chen, Alireza Ghasemi, Junyi Zhang +17
A supersolid is a quantum-entangled state of matter exhibiting the dual characteristics of superfluidity and solidity. Theory predicts that hard-core bosons with repulsive interact…
Valence, exchange interaction, and location of Mn in polycrystalline Mn(x)Ga(1-x)N (x<0.04)
A. Furrer, K. W. Kraemer, A. Podlesnyak +3
We present an experimental study for polycrystalline samples of the diluted magnetic semiconductor Mn(x)Ga(1-x)N (x<0.04) in order to address some of the existing controversial iss…
Orbital selective spin excitations and their impact on superconductivity of LiFe1-xCoxAs
Yu Li, Zhiping Yin, Xiancheng Wang +11
We use neutron scattering to study spin excitations in single crystals of LiFeCoAs, which is located near the boundary of the superconducting phase of LiFe$_{1-x}…
Antiferromagnetic and Orbital Ordering on a Diamond Lattice Near Quantum Criticality
K. W. Plumb, Jennifer Morey, J. A. Rodriguez-Rivera +4
We present neutron scattering measurements on powder samples of the spinel FeSc2S4 that reveal a previously unobserved magnetic ordering transition occurring at 11.8(2)~K. Magnetic…
On the Extraction of Exchange Parameters in Transition-Metal Perovskites
A. Furrer, A. Podlesnyak, K. W. Krämer
The extraction of exchange parameters from measured spin-wave dispersion relations has severe limitations particularly for magnetic compounds such as the transition-metal perovskit…
Pressure-Induced Structural Phase Transition in CeNi: X-ray and Neutron Scattering Studies and First-Principles Calculations
A. Mirmelstein, A. Podlesnyak, Antnio M. dos Santos +7
The pressure-induced structural phase transition in the intermediate-valence compound CeNi has been investigated by X-ray and neutron powder diffraction techniques. For the first t…
Spin dynamics in pressure-induced magnetically-ordered phases in PHCC
G. Perren, J. S. Möller, D. Hüvonen +2
We present inelastic neutron scattering experiments on the frustrated gapped quantum magnet piperazinium hexachlorodicuprate under applied hydrostatic pressure. These resul…
Defect propagation in one-, two-, and three-dimensional compounds doped by magnetic atoms
A. Furrer, A. Podlesnyak, K. W. Krämer +1
Inelastic neutron scattering experiments were performed to study manganese(II) dimer excitations in the diluted one-, two-, and three-dimensional compounds CsMn(x)Mg(1-x)Br(3), K(2…
Propagation of defects in doped magnetic materials of different dimensionality
A. Furrer, A. Podlesnyak, K. W. Kraemer +3
Defects intentionally introduced into magnetic materials often have a profound effect on the physical properties. Specifically tailored neutron spectroscopic experiments can provid…
High magnetic field evolution of ferroelectricity in CuCrO2
Eundeok Mun, M. Frontzek, A. Podlesnyak +4
CuCrO2 offers insights into the different types of spiral magnetic orderings that can form spontaneously due to frustration in triangular-lattice antiferromagnets. We explore the m…
Temperature-driven Phase Transformation in Y_3Co: Neutron Scattering and First-principles Studies
A. Podlesnyak, G. Ehlers, H. Cao +6
Contrary to previous studies that identified the ground state crystal structure of the entire R_3Co series (R is a rare earth) as orthorhombic Pnma, we show that Y_3Co undergoes a…
Dynamics of the fast component of nano-confined water under electric field
S. O. Diallo, E. Mamontov, A. Podlesnyak +4
We report the diffusion of water molecules confined in the pores of folded silica materials (FSM-12 with average pore diameter of 16 Å), measured by means of quasielastic ne…
Structure and Magnetic Properties of the Pyrochlore Iridate Y2Ir2O7
M. C. Shapiro, S. C. Riggs, M. B. Stone +4
Neutron powder diffraction and inelastic measurements were performed examining the 5d pyrochlore YIrO. Temperature dependent measurements were performed between 3.4 K a…
The new Cold Neutron Chopper Spectrometer at the Spallation Neutron Source - Design and Performance
G. Ehlers, A. Podlesnyak, J. L. Niedziela +1
The design and performance of the new Cold Neutron Chopper Spectrometer (CNCS) at the Spallation Neutron Source in Oak Ridge are described. CNCS is a direct geometry inelastic time…
Einstein Modes in the Phonon Density of States of the Single-Filled Skutterudite YbCoSb
I. K. Dimitrov, M. E. Manley, S. M. Shapiro +8
Measurements of the phonon density of states by inelastic neutron \emph{time-of-flight} scattering and specific heat measurements along with first principles calculations, provide…
Quantized antiferromagnetic spin waves in the molecular Heisenberg ring CsFe
J. Dreiser, O. Waldmann, C. Dobe +7
We report on inelastic neutron scattering (INS) measurements on the molecular spin ring CsFe, in which eight spin-5/2 Fe(III) ions are coupled by nearest-neighbor antiferromagn…
Anisotropic magnetic field responses of ferroelectric polarization in a trigonal multiferroic CuFe1-xAlxO2 (x=0.015)
T. Nakajima, S. Mitsuda, S. Kanetsuki +9
We have investigated magnetic field dependences of a ferroelectric incommensurate-helimagnetic order in a trigonal magneto-electric (ME) multiferroic CuFe1-xAlxO2 with x=0.015, whi…