92 citations · 109 across the 5 of their papers we have counts for
5 papers
A precaution for the hybrid density functional calculation of open-shell systems
Jun-Ichi Iwata, Keisuke Sawada, Atsushi Oshiyama
We show that a naive treatment of open-shell systems in hybrid density functional calculations ignoring the spin dependence causes significant errors due to a kind of self interact…
Spontaneous Appearance of Low-dimensional Magnetic Electron System on Semiconductor Nanostructures
Keisuke Sawada, Jun-Ichi Iwata, Atsushi Oshiyama
We find that spin-polarized ground states emerge in nanofacets which are self-organized on SiC (0001) surfaces. Our large-scale density-functional calculations reveal that the nano…
Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by "protect annealing"
M. Horio, T. Adachi, Y. Mori +17
In the hole-doped cuprates, a small amount of carriers suppresses antiferromagnetism and induces superconductivity. In the electron-doped cuprates, on the other hand, superconducti…
Fate of / orbital degeneracy and Fermi surface in Ru substituted FeSeTe
T. Sugimoto, D. Ootsuki, K. Sawada +14
We have investigated the impact of Ru substitution on the multi-band electronic structure of FeSeTe by means of angle-resolved photoemission spectroscopy (ARPES). The A…
Coexistence of Bloch electrons and glassy electrons in Ca10(Ir4As8)(Fe2_xIrxAs2)5 revealed by angle-resolved photoemission spectroscopy
K. Sawada, D. Ootsuki, K. Kudo +9
Angle-resolved photoemission spectroscopy of Ca10(Ir4As8)(Fe2_xIrxAs2)5 shows that the Fe 3d electrons in the FeAs layer form the hole-like Fermi pocket at the zone center and the…