120 citations · 699 across the 31 of their papers we have counts for
31 papers
Probing intrinsic magnetic phases in low-dimensional nearly twin-free NiPS single crystals
Yeochan An, Heejun Yang, Sung Jin Park +6
We report the intrinsic thermal and magnetic properties of the low-dimensional van der Waals (vdW) antiferromagnet NiPS and explore its emergent magnetic phases by controlling…
Unconventional and Fragile Magnetic Exciton in a van der Waals Quantum Magnet
Kai-Xuan Zhang, Min Zhang, Minjae Kim +25
The recently discovered magnetic exciton in the van der Waals (vdW) antiferromagnet NiPS3 exemplifies these phenomena, exhibiting several distinctive characteristics. Despite exten…
Interfacial chirality-induced magnetic-field-free switching with high energy efficiency in all-vdW heterostructures
Kai-Xuan Zhang, Suik Cheon, Seungbok Lee +12
Chirality, a central concept across many scientific disciplines, continues to inspire the discovery of novel physical phenomena. In condensed matter physics, structural chirality -…
Magnetism of single crystalline breathing pyrochlore spinel AgInCr4S8
Andrew F. May, Christopher M. Pasco, V. O. Garlea +5
Single crystals of \ce{AgInCr4S8} were grown by chemical vapor transport and crystallographic ordering of Ag/In that results in a breathing pyrochlore motif of Cr was verifi…
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…
Experimental confirmation of the magnetic ordering transition induced by an electronic structure change in the metallic triangular antiferromagnet CoTaS
Han-Jin Noh, En-Jin Cho, Byeong-Gyu Park +6
We report ARPES studies combined with DFT+DMFT calculations to confirm that the magnetic ordering vector transition from \textbf{Q}=(1/2,0,0) to \textbf{Q}=(1/3,0,0) in the metalli…
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…
Tunable chiral and nematic states in the triple-Q antiferromagnet CoTaS
Erik Kirstein, Pyeongjae Park, Woonghee Cho +3
Complex spin configurations in magnetic materials, ranging from collinear single-Q to noncoplanar multi-Q states, exhibit rich symmetry and chiral properties. However, their detail…
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…
Current-driven collective control of helical spin texture in van der Waals antiferromagnet
Kai-Xuan Zhang, Suik Cheon, Hyuncheol Kim +14
Electrical control of quantum magnetic states is essential in spintronic science. Initial studies on the ferromagnetic state control were extended to collinear antiferromagnets and…
Kitaev interaction and proximate higher-order skyrmion crystal in the triangular lattice van der Waals antiferromagnet NiI2
Chaebin Kim, Olivia Vilella, Youjin Lee +14
Topological spin textures, such as magnetic skyrmions, are a spectacular manifestation of magnetic frustration and anisotropy. Most known skyrmion systems are restricted to a topol…
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…
Spin dynamics of triple-Q magnetic orderings in a triangular lattice: Implications for multi-Q orderings in general two-dimensional lattices
Pyeongjae Park, Woonghee Cho, Chaebin Kim +7
Multi-Q magnetic structures on two-dimensional (2D) lattices provide a key route to realizing topological physics in 2D magnetism. A major experimental challenge is to unambiguousl…
Electrical control of topological 3Q state in intercalated van der Waals antiferromagnet Cox-TaS2
Junghyun Kim, Kai-Xuan Zhang, Pyeongjae Park +4
Van der Waals (vdW) magnets have opened a new avenue of opportunities encompassing various interesting phases. Co1/3TaS2-an intercalated metallic vdW antiferromagnet-is one of the…
Direct Observation and Analysis of Low-Energy Magnons with Raman Spectroscopy in Atomically Thin NiPS3
Woongki Na, Pyeongjae Park, Siwon Oh +6
Van der Waals (vdW) magnets have rapidly emerged as a fertile playground for novel fundamental physics and exciting applications. Despite the impressive developments over the past…
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…
Composition dependence of bulk properties in the Co-intercalated transition-metal dichalcogenide CoTaS
Pyeongjae Park, Woonghee Cho, Chaebin Kim +5
Spontaneous Hall conductivity has recently been reported in the triangular lattice antiferromagnet CoTaS under a zero magnetic field. This phenomenon originates from th…
Rapid suppression of quantum many-body magnetic exciton in doped van der Waals antiferromagnet (Ni,Cd)PS3
Junghyun Kim, Woongki Na, Jonghyeon Kim +7
The unique discovery of magnetic exciton in van der Waals antiferromagnet NiPS3 arises between two quantum many-body states of a Zhang-Rice singlet excited state and a Zhang-Rice t…
Bond-dependent anisotropy and magnon decay in cobalt-based Kitaev triangular antiferromagnet
Chaebin Kim, Sujin Kim, Pyeongjae Park +9
The Kitaev model, a honeycomb network of spins with bond-dependent anisotropic interactions, is a rare example of having a quantum spin liquid ground state. Although most Kitaev mo…
Tetrahedral triple-Q magnetic ordering and large spontaneous Hall conductivity in the metallic triangular antiferromagnet Co1/3TaS2
Pyeongjae Park, Woonghee Cho, Chaebin Kim +14
The triangular lattice antiferromagnet (TLAF) has been the standard paradigm of frustrated magnetism for several decades. The most common magnetic ordering in insulating TLAFs is t…
Spin wave Hamiltonian and anomalous scattering in NiPS
A. Scheie, Pyeongjae Park, J. W. Villanova +8
We report a comprehensive spin wave analysis of the semiconducting honeycomb van der Waal antiferromagnet NiPS. Using single crystal inelastic neutron scattering, we map out th…
Field-tunable toroidal moment and anomalous Hall effect in noncollinear antiferromagnetic Weyl semimetal Co1/3TaS2
Pyeongjae Park, Yoon-Gu Kang, Junghyun Kim +4
Combining magnetism with band topology provides various novel phases that are otherwise impossible. Among several cases, noncollinear metallic antiferromagnets can reveal particula…
Air Stable and Layer Dependent Ferromagnetism in Atomically Thin van der Waals CrPS
Joolee Son, Suhan Son, Pyeongjae Park +15
Ferromagnetism in two-dimensional materials presents a promising platform for the development of ultrathin spintronic devices with advanced functionalities. Recently discovered fer…