651 citations · 1.3k across the 22 of their papers we have counts for
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Topological phase transition and quantum spin Hall edge states of antimony few layers
Sung Hwan Kim, Kyung-Hwan Jin, Joonbum Park +3
While two-dimensional topological insulators (2D TI) initiated the field of topological materials, only very few materials were discovered to date and the direct access to their qu…
Quantum electronic transport of topological surface states in beta-Ag2Se nanowire
Jihwan Kim, Ahreum Hwang, Sang-Hoon Lee +8
Single-crystalline β-Ag2Se nanostructures, a new class of 3D topological insulators (TIs), were synthesized using the chemical vapor transport method. The topological surface state…
Topological fate of edge states of Bi single bilayer on Bi(111)
Han Woong Yeom, Kyung-Hwan Jin, Seung-Hoon Jhi
We address the topological nature of electronic states of step edges of Bi(111) films by first principles band structure calculations. We confirm that the dispersion of step edge s…
Transforming a Surface State of Topological Insulator by a Bi Capping Layer
Han Woong Yeom, Sung Hwan Kim, Woo Jong Shin +7
We introduce a dinstint approach to engineer a topologically protected surface state of a topological insulator. By covering the surface of a topological insulator, Bi2Te2Se, with…
Edge and Interfacial States in a 2D Topological Insulator:Bi(111) Bilayer on BiTeSe
Sung Hwan Kim, Kyung-Hwan Jin, Joonbum Park +4
The electronic states of a single Bi(111) bilayer and its edges, suggested as a two dimensional topological insulator, are investigated by scanning tunneling spectroscopy (STS) and…
Anomalous Optical Phonon Splittings in Sliding Bilayer Graphene
Seon-Myeong Choi, Seung-Hoon Jhi, Young-Woo Son
We study the variations of electron-phonon coupling and their spectroscopic consequences in response to sliding of two layers in bilayer graphene using first-principles calculation…
Proximity-induced giant spin-orbit interaction in epitaxial graphene on topological insulator
Kyung-Hwan Jin, Seung-Hoon Jhi
Heterostructures of Dirac materials such as graphene and topological insulators provide interesting platforms to explore exotic quantum states of electrons in solids. Here we study…
The stability of graphene band structures against an external periodic perturbation; Na on Graphene
Choongyu Hwang, Sunyoung Shin, Seon-Myeong Choi +7
We report that the band of graphene sensitively changes as a function of an external potential induced by Na especially when the potential becomes periodic at low temperature.…
Electronic topological transition in sliding bilayer graphene
Young-Woo Son, Seon-Myeong Choi, Yoon Pyo Hong +2
We demonstrate theoretically that the topology of energy bands and Fermi surface in bilayer graphene undergoes a very sensitive transition when extremely tiny lateral interlayer sh…
Controlling Energy Gap of Bilayer Graphene by Strain
Seon-Myeong Choi, Seung-Hoon Jhi, Young-Woo Son
Using the first principles calculations, we show that mechanically tunable electronic energy gap is realizable in bilayer graphene if different homogeneous strains are applied to t…
Effects of Strain on Electronic Properties of Graphene
Seon-Myeong Choi, Seung-Hoon Jhi, Young-Woo Son
We present first-principles calculations of electronic properties of graphene under uniaxial and isotropic strains, respectively. The semi-metallic nature is shown to persist up to…