27 citations · 65 across the 7 of their papers we have counts for
18 papers
Densest ternary sphere packings
Ryotaro Koshoji, Taisuke Ozaki
We present our exhaustive exploration of the densest ternary sphere packings (DTSPs) for 45 radius ratios and 237 kinds of compositions, which is a packing problem of three kinds o…
The hidden competing phase revealed by first-principles calculations of phonon instability in the nearly optimally doped cuprate LaSrCuO
Chi-Cheng Lee, Ji-Yao Chiu, Yukiko Yamada-Takamura +1
The representative cuprate, LaMCuO, with M = Sr and is studied via first-principles calculations in the high-temperature tetragonal (HTT), low-temperature…
Methods for constructing parameter-dependent flat band lattices
Toshitaka Ogata, Mitsuaki Kawamura, Taisuke Ozaki
We present two methods for constructing a flat band (FB) system having a flat energy dispersion over the entire Brillouin zone within tight-binding model, where the resulting Hamil…
Densest binary sphere packings and phase diagram : revisited
Ryotaro Koshoji, Mitsuaki Kawamura, Masahiro Fukuda +1
We revisit the densest binary sphere packings (DBSP) under the periodic boundary conditions and present an updated phase diagram, including newly found 12 putative densest structur…
First-principles study on the stability and electronic structure of monolayer GaSe with trigonal-antiprismatic structure
Hirokazu Nitta, Takahiro Yonezawa, Antoine Fleurence +2
The structural stability and electronic states of GaSe monolayer with trigonal-antiprismatic (AP) structure, which is a recently discovered new polymorph, were studied by first-pri…
Unfolding optical transition weights of impurity materials for first-principles LCAO electronic structure calculations
Yung-Ting Lee, Chi-Cheng Lee, Masahiro Fukuda +1
A method to analyze optical transitions is developed by combining the Kubo-Greenwood formula with the unfolding method to construct an unfolded electronic band structure with optic…