444 citations · 532 across the 8 of their papers we have counts for
8 papers
A Metal-Insulator Transition via Wigner Crystallization in Boron Triangular Kagome Lattice
Woo Hyun Han, Sunghyun Kim, In-Ho Lee +1
The flat band has attracted a lot of attention because it gives rise to many exotic phases, as recently demonstrated in magic angle twisted bilayer graphene. Here, based on first-p…
Boron Triangular Kagome Lattice with Half-Metallic Ferromagnetism
Sunghyun Kim, W. H. Han, In-Ho Lee +1
Based on the first-principles evolutionary materials design, we report a stable boron Kagome lattice composed of triangles in triangles on a two-dimensional sheet. The Kagome latti…
Dipole-Allowed Direct Band Gap Silicon Superlattices
Young Jun Oh, In-Ho Lee, Sunghyun Kim +2
Silicon is the most popular material used in electronic devices. However, its poor optical properties owing to its indirect band gap nature limit its usage in optoelectronic device…
O-vacancy as the origin of negative bias illumination stress instability in amorphous In-Ga-Zn-O thin film transistors
Byungki Ryu, Hyeon-Kyun Noh, Eun-Ae Choi +1
We find that O-vacancy (Vo) acts as a hole trap and play a role in negative bias illumination stress instability in amorphous In-Ga-Zn-O thin film transistors. Photo-excited holes…
Spectral Correlation in Incommensurate Multi-Walled Carbon Nanotubes
Kang-Hun Ahn, Yong-Hyun Kim, Jan Wiersig +1
We investigate the energy spectra of clean incommensurate double-walled carbon nanotubes, and find that the overall spectral properties are described by the so-called critical stat…
Impurity Doping Effect in High Superconductors
Yong-Jihn Kim, K. J. Chang
It has been observed that impurity doping and/or ion-beam-induced damage in high superconductors cause a metal-insulator transition and thereby suppress the critical temper…
Weak Localization Effect in Superconductors
Yong-Jihn Kim, K. J. Chang
We study the effect of weak localization on the transition temperatures of superconductors using time-reversed scattered state pairs, and find that the weak localization effect wea…
Impurity scattering in superconductors
Yong-Jihn Kim, K. J. Chang
We present some of the recent theoretical studies on the impurity effects in conventional superconductors, such as magnetic and ordinary impurity effects in dirty and weak localiza…