91 citations · 323 across the 19 of their papers we have counts for
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Replica Higher-Order Topology of Hofstadter Butterflies in Twisted Bilayer Graphene
Sun-Woo Kim, Sunam Jeon, Moon Jip Park +1
The Hofstadter energy spectrum of twisted bilayer graphene is found to have recursive higher-order topological properties. We demonstrate that higher-order topological insulator (H…
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…
Topological features of ground states and topological solitons in generalized Su-Schrieffer-Heeger models using generalized time-reversal, particle-hole, and chiral symmetries
Sang-Hoon Han, Seung-Gyo Jeong, Sun-Woo Kim +2
Topological phases and their topological features are enriched by the fundamental time-reversal, particle-hole, and chiral as well as crystalline symmetries. While one-dimensional…
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…
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-polarization in the vicinity of quantum point contact with spin-orbit interaction
Sunwoo Kim, Yoshiaki Hashimoto, Taketomo Nakamura +1
We have developed a novel technique for detection of spin polarization with a quantum dot weakly coupled to the objective device. The disturbance to the object in this technique is…
Origin of the Metal-Insulator Transition of Indium Atom Wires on Si(111)
Sun-Woo Kim, Jun-Hyung Cho
As a prototypical one-dimensional electron system, self-assembled indium (In) nanowires on the Si(111) surface have been believed to drive a metal-insulator transition by a charge-…
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…
Antiferromagnetic ordering of dangling-bond electrons at the stepped Si(001) surface
Jun-Ho Lee, Sun-Woo Kim, Jun-Hyung Cho
Using first-principles density-functional calculations, we explore the possibility of magnetic order at the rebonded step of the Si(001) surface. The rebonded step cont…
Evidence of Spin-Filtering in Quantum Constrictions with Spin-Orbit Interaction
Sunwoo Kim, Yoshiaki Hashimoto, Yasuhiro Iye +1
A new type of blockade effect - spin-orbit blockade (SOB) - is found in the conduction of a quantum dot (QD) made of a material with spin-orbit interaction. The blockade arises fro…