241 citations · 993 across the 25 of their papers we have counts for
25 papers
Circular dichroism of emergent chiral stacking orders in quasi-one-dimensional charge density waves
Sun-Woo Kim, Hyun-Jung Kim, Sangmo Cheon +1
Chirality-driven optical properties in charge density waves are of fundamental and practical importance. Here, we investigate the interaction between circularly polarized light and…
Reshaped Weyl fermionic dispersions driven by Coulomb interactions in MoTe2
Seoung-Hun Kang, Sangjun Jeon, Hyun-Jung Kim +7
We report the direct evidence of impacts of the Coulomb interaction in a prototypical Weyl semimetal, MoTe2, that alter its bare bands in a wide range of energy and momentum. Our q…
topology of bismuth
Irene Aguilera, Hyun-Jung Kim, Christoph Friedrich +2
While first-principles calculations with different levels of sophistication predict a topologically trivial state for bulk bismuth, some photoemission experiments show surfac…
Two-dimensional chiral stacking orders in quasi-one-dimensional charge density waves
Sun-Woo Kim, Hyun-Jung Kim, Sangmo Cheon +1
Chirality manifests in various forms in nature. However, there is no evidence of the chirality in one-dimensional charge density wave (CDW) systems. Here, we have explored the chir…
Ferromagnetic Weyl Fermions in Two-Dimensional Layered Electride GdC
Shuyuan Liu, Chongze Wang, Liangliang Liu +5
Recently, two-dimensional layered electrides have emerged as a new class of materials which possess anionic electron layers in the interstitial spaces between cationic layers. Here…
Symmetry dictated grain boundary state in a two-dimensional topological insulator
Hyo Won Kim, Seoung-Hun Kang, Hyun-Jung Kim +10
Structural imperfections such as grain boundaries (GBs) and dislocations are ubiquitous in solids and have been of central importance in understanding nature of polycrystals. In ad…
Competing edge structures of Sb and Bi bilayers by trivial and nontrivial band topologies
Sang-Min Jeong, Seho Yi, Hyun-Jung Kim +2
One-dimensional (1D) edge states formed at the boundaries of 2D normal and topological insulators have shown intriguing quantum phases such as charge density wave and quantum spin…
Persistence of Island Arrangements During Layer-by-Layer Growth Revealed Using Coherent X-rays
Guangxu Ju, Dongwei Xu, Matthew J. Highland +7
Understanding surface dynamics during epitaxial film growth is key to growing high quality materials with controllable properties. X-ray photon correlation spectroscopy (XPCS) usin…
Microscopic mechanism of tunable band gap in potassium doped few-layer black phosphorus
Sun-Woo Kim, Hyun Jung, Hyun-Jung Kim +3
Tuning band gaps in two-dimensional (2D) materials is of great interest in the fundamental and practical aspects of contemporary material sciences. Recently, black phosphorus (BP)…
Origins of the structural phase transitions in MoTe and WTe
Hyun-Jung Kim, Seoung-Hun Kang, Ikutaro Hamada +1
Layered transition metal dichalcogenides MoTe and WTe share almost similar lattice constants as well as topological electronic properties except their structural phase tran…
Contrasting diffusion behaviors of O and F atoms on graphene and within bilayer graphene
Seho Yi, Hyun-Jung Kim, Jin-Ho Choi +1
The chemical modification of graphene with adatoms is of importance for nanoelectronics applications. Based on first-principles density-functional theory calculations with includin…
Comment on "Quasi-One-Dimensional Metal-Insulator Transitions in Compound Semiconductor Surfaces"
Sun-Woo Kim, Yoon-Gu Kang, Hyun-Jung Kim +1
In a recent Letter, Zhao et al. [1] reported the origin of quasi-one-dimensional metal-insulator (MI) transitions in compound semiconductor surfaces. Based on a density-functional…
Spin-orbit coupling effects on the stability of two competing structures in Pb/Si(111) and Pb/Ge(111)
Xiao-Yan Ren, Hyun-Jung Kim, Seho Yi +2
Using first-principles density-functional theory (DFT) calculations, we investigate the 4/3-monolayer structure of Pb on the Si(111) or Ge(111) surface within the two competing str…
Origin of Symmetric Dimer Images of Si(001) Observed in Low-Temperature STM
Xiao-Yan Ren, Hyun-Jung Kim, Chun-Yao Niu +2
It has been a long-standing puzzle why buckled dimers of the Si(001) surface appeared symmetric below 20 K in scanning tunneling microscopy (STM) experiments. Although such symmetr…
Competing Magnetic Orderings and Tunable Topological States in Two-Dimensional Hexagonal Organometallic Lattices
Hyun-Jung Kim, Chaokai Li, Ji Feng +2
The exploration of topological states is of significant fundamental and practical importance in contemporary condensed matter physics, for which the extension to two-dimensional (2…
Giant Spin-Orbit-Induced Spin Splitting in Bi Chains on GaAs(110)
Hyun-Jung Kim, Jun-Hyung Cho
The search for one-dimensional electron systems with a giant Rashba-type spin splitting is of importance for the application of spin transport. Here we report, based on a first-pri…
Contrasting interedge superexchange interactions of graphene nanoribbons embedded in h-BN and graphane
Sun-Woo Kim, Hyun-Jung Kim, Jin-Ho Choi +2
Based on first-principles density-functional theory calculations, we present a comparative study of the elec- tronic structures of ultranarrow zigzag graphene nanoribbons (ZGNRs) e…
Equivalence of Electronic and Mechanical Stresses in Structural Phase Stabilization: A Case Study of Indium Wires on Si(111)
Sun-Woo Kim, Hyun-Jung Kim, Fangfei Ming +4
It was recently proposed that the stress state of a material can also be altered via electron or hole doping, a concept termed electronic stress (ES), which is different from the t…
Nature of the Insulating Ground State of the 5d PostPerovskite CaIrO3
Sun-Woo Kim, Chen Liu, Hyun-Jung Kim +4
The insulating ground state of the 5d transition metal oxide CaIrO3 has been classified as a Mott-type insulator. Based on a systematic density functional theory (DFT) study with l…
Antiferromagnetic Slater Insulator Phase of Na2IrO3
Hyun-Jung Kim, Jun-Ho Lee, Jun-Hyung Cho
Using a hybrid density-functional theory (DFT) calculation including spin-orbit coupling (SOC), we predict that the zigzag antiferromagnetic (AFM) ground state of the honeycomb lay…
Ferrimagnetic Slater Insulator Phase of the Sn/Ge(111) Surface
Jun-Ho Lee, Hyun-Jung Kim, Jun-Hyung Cho
We have performed the semilocal and hybrid density-functional theory (DFT) studies of the Sn/Ge(111) surface to identify the origin of the observed insulating ${\sqrt{3}}{\times}{\…
Fluorine-induced local magnetic moment in graphene: A hybrid DFT study
Hyun-Jung Kim, Jun-Hyung Cho
Recent experimental evidence that fluorinated graphene creates local magnetic moments around F adatoms has not been supported by semilocal density-functional theory (DFT) calculati…
Driving force of phase transition in Indium nanowires on Si(111)
Hyun-Jung Kim, Jun-Hyung Cho
The precise driving force of the phase transition in indium nanowires on Si(111) has been controversial whether it is driven by a Peierls instability or by a simple energy lowering…
Physisorption of DNA nucleobases on h-BN and graphene: vdW-corrected DFT calculations
Jun-Ho Lee, Yun-Ki Choi, Hyun-Jung Kim +2
We present a comparative study of DNA nucleobases [guanine (G), adenine (A), thymine (T), and cytosine (C)] adsorbed on hexagonal boron nitride (\textit{h}-BN) sheet and graphene,…