238 citations · 1.5k across the 47 of their papers we have counts for
10 papers · 1 filter
Atomistic origin of metal versus charge-density-wave phase separation in indium atomic wires on Si(111)
Sun kyu Song, Han Woong Yeom
We investigate in atomic scale the electronic phase separation occurring in the well known quasi 1D charge-density wave (CDW) phase of the In atomic wire array on a Si(111) surface…
Switching Chiral Solitons for Algebraic Operation of Topological Quaternary Digits
Tae-Hwan Kim, Sangmo Cheon, Han Woong Yeom
Chirality is ubiquitous in nature and chiral objects in condensed matter are often excited states protected by system's topology. The use of chiral topological excitations to carry…
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…
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…
Electron Quantization in Broken Atomic Wires
Eui Hwan Do, Han Woong Yeom
We demonstrate using scanning tunneling microscopy and spectroscopy the electron quantization within metallic Au atomic wires self-assembled on a Si(111) surface and segmented by a…
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…
Impurity-mediated early condensation of an atomic layer electronic crystal
Han Woong Yeom, Deok Mahn Oh, S. Wippermann +1
While impurity has been known widely to affect phase transitions, the atomistic mechanisms have rarely been disclosed. We directly show in atomic scale how impurity atoms induces t…
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…
Self-Assembled Nanowires with Giant Rashba-Type Band Splitting
Jewook Park, Sung Won Jung, Min-Cherl Jung +3
We investigated Pt-induced nanowires on the Si(110) surface using scanning tunneling microscopy (STM) and angle-resolved photoemission (ARP). High resolution STM images show a well…
Topological Solitons versus Non-Solitonic Phase Defects in Quasi-One-Dimensional Charge Density Wave
Tae-Hwan Kim, Han Woong Yeom
We investigated phase defects in a quasi-one-dimensional commensurate charge density wave (CDW) system, an In atomic wire array on Si(111), using low temperature scanning tunneling…