77 citations · 200 across the 6 of their papers we have counts for
7 papers
Unique Charge-density-wave Order and Fluctuation-induced Phonon Softening in the Optimally-doped Trilayer Cuprate BiSrCaCuO
S. Nakata, K. Yamamoto, J. Okamoto +11
Charge-density-wave (CDW) order is a ubiquitous feature of cuprate superconductors that competes with superconductivity. However, its behavior remains poorly understood in trilayer…
Thickness dependence and dimensionality effects of charge and magnetic orderings in La1/3Sr2/3FeO3 thin films
Kohei Yamamoto, Yasuyuki Hirata, Masafumi Horio +9
We investigate the thickness effects on charge and magnetic orderings in Fe perovskite oxide La1/3Sr2/3FeO3/SrTiO3 thin films by hard x-ray and resonant soft x-ray scattering (RSXS…
Time-resolved photoemission apparatus achieving sub-20-meV energy resolution and high stability
Y. Ishida, T. Togashi, K. Yamamoto +5
The paper describes a time- and angle-resolved photoemission apparatus consisting of a hemispherical analyzer and a pulsed laser source. We demonstrate 1.48-eV pump and 5.90-eV pro…
Phonon assisted resonant tunnelling and its phonons control
F. V. Kusmartsev, V. D. Krevchik, M. B. Semenov +11
We observe a series of sharp resonant features in the tunnelling differential conductance of InAs quantum dots. We found that dissipative quantum tunnelling has a strong influence…
Non-thermal hot electrons ultrafastly generating hot optical phonons in graphite
Y. Ishida, T. Togashi, K. Yamamoto +6
Ultrafast dynamics of graphite is investigated by time-resolved photoemission spectroscopy. We observe spectral features of direct photoexcitations, non-thermal electron distributi…
Epitaxial Growth of a Full-Heusler Alloy CoFeSi on Silicon by Low-Temperature Molecular Beam Epitaxy
S. Yamada, K. Yamamoto, K. Ueda +4
For electrical spin injection and detection of spin-polarized electrons in silicon, we explore highly epitaxial growth of ferromagnetic full-Heusler-alloy Co2FeSi thin films on sil…
Electronic Structures of MgB{} under Uniaxial and Hydrostatic Compression
K. Kobayashi, K. Yamamoto
Electronic and lattice properties of MgB{} under uniaxial and hydrostatic compression are calculated. Lattice properties are optimized automatically by using the first-principl…