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Articles by Junyeong Ahn
OmniShowcase: Omnidirectional Subject-Consistent Video Generation from Multi-View Images
Get this paper in your agent: hf papers read 2610.35684 Don't have the latest CLI? curl -LsSf https://hf.co/cli/install.sh | bash Models citing this paper 0 No model linking this paper Cite arxiv.org/abs/2610.35684 in a model README.md to link it from this page. Datasets citing this paper 0 No dataset linking this paper Cite arxiv.org/abs/2610.35684 in a dataset README.md to link it from this page.
Observation of the axion quasiparticle in 2D MnBi2Te4 - Nature
Abstract The axion is a hypothetical fundamental particle that is conjectured to correspond to the coherent oscillation of the θ field in quantum chromodynamics1,2. Its existence would solve multiple fundamental questions, including the strong CP problem of quantum chromodynamics and dark matter, but the axion has never been detected.
UOTe: Kondo‐Interacting Topological Antiferromagnet in a Van der Waals Lattice
Conflict of Interest The authors declare no conflict of interest. Supporting Information Filename Description adma202414966-sup-0001-SuppMat.pdf8.1 MB Supporting Information References 1, , , , Phys. Rev. B 2015, 92, 075402. 2, , , , , , , , , , , , Nature 2019, 572, 95. 3, , , Phys. Rev. Lett. 2019, 122, 106405. 4, , Nat. Mater. 2020, 19, 1265. 5, , , 2D Mater. 2020, 8, 022002. 6, , Phys. Rev. Lett. 2018, 121, 266401. 7, , , , , , , Nat. Phys. 2020, 16, 1093. 8, , , , , , , , , , , , , , , , , , , , , , , , Nat.
Unexpected band structure changes within the higher-temperature antiferromagnetic state of CeBi - Communications Materials
Abstract The interest in the rare-earth monopnictides was boosted after the discovery of unconventional surface-state pairs in antiferromagnetically ordered NdBi. In contrast to other materials in which such states were reported, CeBi is known to have multiple antiferromagnetic phases.
The effect of intravitreal cidofovir injection on end-stage glaucoma in dogs: a retrospective study of 153 eyes
Keywords: canine; end-stage glaucoma; cidofovir; intravitreal injection; pharmacological ciliary body ablation Introduction Canine glaucoma constitutes a group of diseases characterized by increased intraocular pressure (IOP), disruption of axoplasmic flow in the optic nerve head, apoptosis of retinal ganglion cells and their axons, and cupping of the optic disc.1 Glaucoma is one of the leading causes of blindness in dogs, with a prevalence rate of approximately 1% to 2%.2–4 Even with...
Topological Circular Dichroism in Chiral Multifold Semimetals
Uncovering the physical contents of the nontrivial topology of quantum states is a critical problem in condensed matter physics. Here, we study the topological circular dichroism in chiral semimetals using linear response theory and first-principles calculations. We show that, when the low-energy spectrum respects emergent SO(3) rotational symmetry, topological circular dichroism is forbidden for Weyl fermions, and thus is unique to chiral multifold fermions.
Topological enhancement of nonlinear transport in unconventional point-node semimetals
Abstract The topological singularity of the Bloch states close to the Fermi level significantly enhances nonlinear electric responses in topological semimetals. Here, we systematically characterize this enhancement for a large class of topological nodal-point fermions, including those with linear, linear-quadratic, and quadratic dispersions.
Nonlinear photoconductivities and quantum geometry of chiral multifold fermions
Abstract Chiral multifold fermions are quasiparticles that appear only in chiral crystals such as transition metal silicides in the cubic B20 structure (i.e., the CoSi family), and they may show exotic physical properties.
Unconventional surface state pairs in a high-symmetry lattice with anti-ferromagnetic band-folding - Communications Physics
Abstract Many complex magnetic structures in a high-symmetry lattice can arise from a superposition of well-defined magnetic wave vectors. These “multi-q” structures have garnered much attention because of interesting real-space spin textures such as skyrmions. However, the role multi-q structures play in the topology of electronic bands in momentum space has remained rather elusive.
Axion optical induction of antiferromagnetic order - Nature Materials
Abstract Using circularly polarized light to control quantum matter is a highly intriguing topic in physics, chemistry and biology. Previous studies have demonstrated helicity-dependent optical control of chirality and magnetization, with important implications in asymmetric synthesis in chemistry; homochirality in biomolecules; and ferromagnetic spintronics.
Theory of optical axion electrodynamics and application to the Kerr effect in topological antiferromagnets - Nature Communications
Abstract Emergent axion electrodynamics in magneto-electric media is expected to provide novel ways to detect and control material properties with electromagnetic fields. However, despite being studied intensively for over a decade, its theoretical understanding remains mostly confined to the static limit. Here, we introduce a theory of axion electrodynamics at general frequencies.
Publisher Correction: Emergence of Fermi arcs due to magnetic splitting in an antiferromagnet - Nature
Correction to: Nature https://doi.org/10.1038/s41586-022-04412-x Published online 23 March 2022 In the version of this article initially published, Jaime Sánchez-Barriga’s first name was misspelled as Jamie.
Two-dimensional higher-order topology in monolayer graphdiyne
Abstract Based on first-principles calculations and tight-binding model analysis, we propose monolayer graphdiyne as a candidate material for a two-dimensional higher-order topological insulator protected by inversion symmetry. Despite the absence of chiral symmetry, the higher-order topology of monolayer graphdiyne is manifested in the filling anomaly and charge accumulation at two corners.
Phys. Rev. X 9, 021013 (2019) - Failure of Nielsen-Ninomiya Theorem and Fragile Topology in Two-Dimensional Systems with Space-Time Inversion Symmetry: Application to Twisted Bilayer Graphene at Magic Angle
Abstract We show that the Wannier obstruction and the fragile topology of the nearly flat bands in twisted bilayer graphene at magic angle are manifestations of the nontrivial topology of two-dimensional real wave functions characterized by the Euler class. To prove this, we examine the generic band topology of two-dimensional real fermions in systems with space-time inversion IST symmetry. The Euler class is an integer topological invariant classifying real two-band systems.
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