Publications (18)
Fermi surfaces, electron-hole asymmetry and correlation kink in a three-dimensional Fermi liquid LaNiO
R. Eguchi, A. Chainani, M. Taguchi +6
We report the three-dimensional (3-D) momentum-resolved soft x-ray photoemission spectroscopy of the Fermi liquid LaNiO. The out-of-plane and in-plane cuts of the 3-D electron-…
Photoelectron Angular Distributions for Two-photon Ionization of Helium by Ultrashort Extreme Ultraviolet Free Electron Laser Pulses
R. Ma, K. Motomura, K. L. Ishikawa +19
Phase-shift differences and amplitude ratios of the outgoing and continuum wave packets generated by two-photon ionization of helium atoms are determined from the photoelec…
Revisiting the valence-band and core-level photoemission spectra of NiO
M. Taguchi, M. Matsunami, Y. Ishida +10
We have re-examined the valence-band (VB) and core-level electronic structure of NiO by means of hard and soft x-ray photoemission spectroscopy (PES). The spectral weight of the lo…
Evidence for Oxygen Holes due to d-p Rehybridization in Thermoelectric Sr_{1-x}Rh_{2}O_{4}
Y. Ishida, T. Baba, R. Eguchi +8
Soft-x-ray photoemission and absorption spectroscopies are employed to investigate the electronic structures of Sr_{1-x}Rh_{2}O_{4}. Similarly to the layered cobaltates such as Na_…
Combining photoemission and optical spectroscopies for reliable valence determination in YbS and Yb metal
M. Matsunami, A. Chainani, M. Taguchi +13
Hard x-ray photoemission and optical spectroscopies have been performed on YbS and Yb metal to determine the precise -electron occupation. A comparison of the photoemission spec…
Electronic structure of an antiferromagnetic metal: CaCrO3
P. A. Bhobe, A. Chainani, M. Taguchi +11
We report on the electronic structure of the perovskite oxide CaCrO3 using valence-band, core-level, and Cr 2p - 3d resonant photoemission spectroscopy (PES). Despite its antiferro…
Nanoscale Dichotomy of Ti 3d Carriers Mediating the Ferromagnetism in Co:TiO2 Anatase Thin Films
T. Ohtsuki, A. Chainani, R. Eguchi +11
We study the surface and bulk electronic structure of the room-temperature ferromagnet Co:TiO2 anatase films using soft and hard x-ray photoemission spectroscopy with probe sensiti…
Temperature-Dependence of Magnetically-Active Charge Excitations in Magnetite across the Verwey Transition
M. Taguchi, A. Chainani, S. Ueda +16
We have studied the electronic structure of bulk single crystals and epitaxial films of magnetite FeO. Fe core-level spectra show clear differences between hard x-ray…
Recoil Effect of Photoelectrons in the Fermi-Edge of Simple Metals
Y. Takata, Y. Kayanuma, S. Oshima +13
High energy resolution photoelectron spectroscopy of conduction electrons in the vicinity of the Fermi-edge in Al and Au at the excitation energy of 880 and 7940 eV was carried out…
Evidence for mass renormalization in LaNiO$"" sub 3_: an in situ soft x-ray photoemission study of epitaxial films
K. Horiba, R. Eguchi, M. Taguchi +5
We investigate the electronic structure of high-quality single-crystal LaNiO (LNO) thin films using in situ photoemission spectroscopy (PES). The in situ high-resolution soft x…
Out-of-plane nesting driven spin spiral in ultrathin Fe/Cu(001) films
J. Miyawaki, A. Chainani, Y. Takata +5
Epitaxial ultrathin Fe films on fcc Cu(001) exhibit a spin spiral (SS), in contrast to the ferromagnetism of bulk bcc Fe. We study the in-plane and out-of-plane Fermi surfaces (FSs…
Electronic structure of semiconducting CeFeP: Strong hybridization and relevance of single-impurity Anderson model
M. Matsunami, K. Horiba, M. Taguchi +16
Semiconducting skutterudite CeFeP is investigated by synchrotron x-ray photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). Ce 3 core-level PES a…
Temperature dependent Eu 3d-4f X-ray Absorption and Resonant Photoemission Study of the Valence Transition in
K. Yamamoto, K. Horiba, M. Taguchi +10
We study the mixed valence transition ( 80 K) in EuNi(SiGe) using Eu 3 X-ray absorption spectroscopy (XAS) and resonant photoemissi…
Photoemission evidence for a Mott-Hubbard metal-insulator transition in VO
R. Eguchi, M. Taguchi, M. Matsunami +15
The temperature () dependent metal-insulator transition (MIT) in VO is investigated using bulk sensitive hard x-ray ( 8 keV) valence band, core level, and V 2 re…
Evidence for a correlated insulator to antiferromagnetic metal transition in CrN
P. A. Bhobe, A. Chainani, M. Taguchi +15
We investigate the electronic structure of Chromium Nitride (CrN) across the first-order magneto-structural transition at T_N ~ 286 K. Resonant photoemission spectroscopy shows a g…
Anomalous State Sandwiched between Fermi Liquid and Charge Ordered Mott-Insulating Phases of Ti4O7
M. Taguchi, A. Chainani, M. Matsunami +15
The Magneli phase Ti4O7 exhibits two sharp jumps in resistivity with coupled structural transitions as a function of temperature at Tc1=142 K and Tc2=154 K. We have studied electro…
Electronic excitations of magnetic impurity state in diluted magnetic semiconductor (Ga,Mn)As
M. Kobayashi, H. Niwa, Y. Takeda +9
The electronic structure of doped Mn in (Ga,Mn)As is studied by resonant inelastic X-ray scattering (RIXS). From configuration-interaction cluster-model calculations, the line shap…
Coherent and Incoherent States of Electron-doped SrTiO3
Y. Ishida, R. Eguchi, M. Matsunami +7
Resonant photoemission at the Ti 2p and O 1s edges on a Nb-doped SrTiO3 thin film revealed that the coherent state (CS) at the Fermi level (EF) had mainly Ti 3d character whereas t…