48 citations · 305 across the 29 of their papers we have counts for
26 papers · 1 filter
Superconductivity and fractionalized magnetic excitations in CeCoIn5
Pyeongjae Park, Shang-Shun Zhang, Pietro M. Bonetti +8
Recent experiments on CeCoIn5 -- a prototypical d-wave superconductor -- indicate that its normal state lies near an unconventional quantum critical point (QCP). One intriguing hyp…
Magnetic order and excitations in CeTiBi and CeZrBi
Pyeongjae Park, Qianli Ma, Wei Tian +7
The R3MBi5 rare-earth intermetallics (R = rare earth, M = Ti, Zr, Sc) provide a versatile platform to explore how Kondo hybridization, RKKY exchange, magnetic frustration, and brok…
Skyrmion and Meron Crystals in Intermetallic GdRuAl: Microscopic Model Insights into Chiral Phases
Jiajun Mo, Leandro M. Chinellato, Fletcher Williams +14
Topological spin textures in frustrated intermetallics hold great promise for spintronics applications. However, understanding their origin and properties remains a significant cha…
Magnetic Field Dependence of the Spin Fluctuations in CeCuAg
X. Boraley, A. D. Christianson, J. Lass +9
Quantum phase transitions are among the most intriguing phenomena that can occur when the electronic ground state of correlated metals are tuned by external parameters such as pres…
From weakly interacting spinons to tightly bound triplons in the frustrated quantum spin-Peierls chain
Pyeongjae Park, Bo Xiao, Karolina Górnicka +7
Fractionalized quasiparticles and their confinement into emergent bound states lie at the heart of modern quantum magnetism. While the evolution into magnonic bound states has been…
Crystal field splittings and magnetic ground state of the square-lattice antiferromagnets YbBi2ClO4 and YbBi2IO4 with Jeff = 1/2
Pyeongjae Park, Qianli Ma, G. Sala +5
We report on the crystal field level splitting and magnetic ground state of the Jeff = 1/2 square lattice antiferromagnets YbBi2ClO4 and YbBi2IO4 using powder inelastic neutron sca…
Dipolar and quadrupolar correlations in the Re-based double perovskites BaYReO and BaScReO
Otkur Omar, Yang Zhang, Qiang Zhang +8
Double perovskites containing heavy transition metal ions are an important family of compounds for the study of the interplay between electron correlation and spin-orbit coupling.…
Spin density wave and van Hove singularity in the kagome metal CeTi3Bi4
Pyeongjae Park, Brenden R. Ortiz, Milo Sprague +15
Kagome metals with van Hove singularities near the Fermi level can host intriguing quantum phenomena such as chiral loop currents, electronic nematicity, and unconventional superco…
Simultaneous development of antiferromagnetism and local symmetry breaking in a kagome magnet (CoFe)Sn
Tsung-Han Yang, Shang Gao, Yuanpeng Zhang +6
CoSn and FeSn, two kagome-lattice metals, have recently attracted significant attention as hosts of electronic flat bands and emergent physical properties. However, current underst…
Quantum and classical spin dynamics across temperature scales in the S = 1/2 Heisenberg antiferromagnet
Pyeongjae Park, G. Sala, Daniel M. Pajerowski +6
Using the framework of semi-classical Landau-Lifshitz dynamics (LLD), we conduct a systematic investigation of the temperature-dependent spin dynamics in the S = 1/2 Heisenberg squ…
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…
Spontaneous Chirality Flipping in an Orthogonal Spin-Charge Ordered Topological Magnet
H. Miao, J. Bouaziz, G. Fabbris +11
The asymmetric distribution of chiral objects with opposite chirality is of great fundamental interests ranging from molecular biology to particle physics. In quantum materials, ch…
Nanometric modulations of the magnetic structure of the element Nd
H. Suriya Arachchige, L. M. DeBeer-Schmitt, L. L. Kish +17
The rare earth neodymium arguably exhibits the most complex magnetic ordering and series of magnetic phase transitions of the elements. Here we report the results of small-angle ne…
Spin dynamics of the spin chain antiferromagnet RbFeS
Lisi Li, Liangliang Zheng, Benjamin A. Frandsen +4
We report transport and inelastic neutron scattering studies on electronic properties and spin dynamics of the quasi-one-dimensional spin chain antiferromagnet RbFeS. An antife…
Strongly Gapped Spin-Wave Excitation in the Insulating Phase of NaOsO3
S. Calder, J. G. Vale, N. Bogdanov +13
NaOsO3 hosts a rare manifestation of a metal-insulator transition driven by magnetic correlations, placing the magnetic exchange interactions in a central role. We use resonant ine…
Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2 Sr2MgOsO6
Ryan Morrow, Alice E. Taylor, D. J. Singh +10
The influence of spin-orbit coupling (SOC) on the physical properties of the 5d2 system Sr2MgOsO6 is probed via a combination of magnetometry, specific heat measurements, elastic a…
Quantum Critical Fluctuations in the Heavy fermion compound Ce(NiPd)Ge
C. H. Wang, L. Poudel, A. E. Taylor +13
Electric resistivity, specific heat, magnetic susceptibility, and inelastic neutron scattering experiments were performed on a single crystal of the heavy fermion compound Ce(Ni$_{…
Soft striped magnetic fluctuations competing with superconductivity in Fe_{1+x}Te
C. Stock, E. E. Rodriguez, O. Sobolev +5
Neutron spectroscopy is used to investigate the magnetic fluctuations in Fe_{1+x}Te - a parent compound of chalcogenide superconductors. Incommensurate "stripe-like" excitations so…
Q-dependence of the spin fluctuations in the intermediate valence compound CePd3
V. R. Fanelli, J. M. Lawrence, E. A. Goremychkin +7
We report inelastic neutron scattering experiments on a single crystal of the intermediate valence compound CePd3. At 300 K the magnetic scattering is quasielastic, with halfwidth…
Magnetic Order in TbCo2Zn20 and TbFe2Zn20
W. Tian, A. D. Christianson, J. L. Zarestky +5
We report neutron diffraction studies of TbCoZn and TbFeZn, two isostructural compounds which exhibit dramatically different magnetic behavior. In the case of…
Neutron scattering and scaling behavior in URu2Zn20 and YbFe2Zn20
C. H. Wang, A. D. Christianson, J. M. Lawrence +13
The dynamic susceptibility chi"(deltaE), measured by inelastic neutron scattering measurements, shows a broad peak centered at Emax = 16.5 meV for the cubic actinide compound URu2Z…
Crystal Field Effects in CeIrIn5
A. D. Christianson, J. M. Lawrence, P. S. Riseborough +9
In this work, we study crystalline electric field effects in the heavy fermion superconductor CeIrIn5. We observe two regions of broad magnetic response in the inelastic neutron sc…
Neutron scattering study of cyrstal fields in CeRhIn5
A. D. Christianson, J. M. Lawrence, P. G. Pagliuso +7
Neutron scattering results for the tetragonal compound CeRhIn5 give evidence for two crystal field (CF) excitations at 6.9 and 23.6 meV. The scattering can be fit assuming a set of…
Magnetic Properties of Heavy Fermion Superconductors CeRhIn5 and Ce2RhIn8
Wei Bao, G. Aeppli, A. D. Christianson +7
Some recent neutron scattering works on CeRhIn5 and Ce2RhIn8, together with related resistivity and specific heat measurements, are summarized. In spite of its layered crystal stru…