Ebata, K., Takizawa, M., Fujimori, A., Kuwahara, H., Tomioka, Y., Tokura, Y.
We have studied the effects of band filling and bandwidth control on the chemical potential in perovskite manganites $R_{1-x}A_x$MnO$_3$ ($R$ : rare earth, $A$ : alkaline earth) by measurements of...
Effects of out-of-plane disorder on the nodal quasiparticle and superconducting gap in Bi2201 (2008)
Hashimoto, M., Yoshida, T., Fujimori, A., Lu, D. H., Kubota, M., ...
How out-of-plane disorder affects the electronic structure has been investigated for the single-layer cuprates Bi$_2$Sr$_{1.6}$$Ln$$_{0.4}$CuO$_{6+\delta}$ ($Ln$ = La, Nd, Gd) by angle-resolved...
Remote hole-doping of Mott insulators on the nanometer scale (2008)
Takizawa, M., Hotta, Y., Susaki, T., Ishida, Y., Wadati, H., Takata, Y., ...
At interfaces between polar and nonpolar perovskite oxides, an unusual electron-doping has been previously observed, due to electronic reconstructions. We report on remote hole-doping at an interface...
Bulk-like d band of SrVO3 under a self-protective cap layer (2008)
Takizawa, M., Minohara, M., Kumigashira, H., Toyota, D., Oshima, M., Wadati, H., ...
We have performed a detailed angel-resolved photoemission spectroscopy study of in-situ prepared SrVO3 thin films. Naturally capped by a ``transparent'' protective layer, contributions from surface...
Hashimoto, M., Yoshida, T., Tanaka, K., Fujimori, A., Okusawa, M., Wakimoto, S., ...
From temperature-dependent angle-integrated photoemission studies of hole-doped La$_{2}$CuO$_4$ and subsequent scaling analysis, we have deduced the ``coherence temperature'' $T_{coh}$ above which...
Song, G. S., Kobayashi, M., Hwang, J. I., Kataoka, T., Takizawa, M., Fujimori, A., ...
The electronic structure of the magnetic semiconductor Ga$_{1-x}$Cr$_{x}$N and the effect of Si doping on it have been investigated by photoemission and soft x-ray absorption spectroscopy. We have...
Kobayashi, M., Ishida, Y., Hwang, J. I., Song, G. S., Fujimori, A., ...
The electronic structure of the Cr ions in the diluted ferromagnetic semiconductor Zn$_{1-x}$Cr$_x$Te ($x=0.03$ and 0.15) thin films has been investigated using x-ray magnetic circular dichroism...
Ikeda, M., Yoshida, T., Fujimori, A., Kubota, M., Ono, K., Das, Hena, ...
We have performed angle-resolved photoemission spectroscopy (ARPES) measurements and first-principles electronic structure calculations on the electron-doped high-Tc superconductors Ln1.85Ce0.15CuO4...
Kobayashi, M., Ishida, Y., Hwang, J. I., Song, G. S., Takizawa, M., Fujimori, A., ...
The electronic structure of In$_{2-x}$V$_x$O$_3$ ($x=0.08$) has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The V $2p$ core-level PES and XAS...
Takeda, Y., Kobayashi, M., Okane, T., Ohkochi, T., Okamoto, J., Saitoh, Y., ...
The magnetic properties of as-grown Ga$_{1-x}$Mn$_{x}$As have been investigated by the systematic measurements of temperature and magnetic field dependent soft x-ray magnetic circular dichroism...
Hashimoto, M., Yoshida, T., Yagi, H., Takizawa, M., Fujimori, A., Kubota, M., ...
We have performed angle-resolved photoemission and core-level x-ray photoemission studies of the single-layer cuprate Bi$_2$Sr$_{2-x}$La$_x$CuO$_{6+\delta}$ (Bi2201) and revealed the doping evolution...
Effects of electron-phonon coupling in angle-resolved photoemission spectra of SrTiO3 (2007)
Maekawa, K., Takizawa, M., Wadati, H., Yoshida, T., Fujimori, A., Kumigashira, H., ...
We have studied the O 2p valence-band structure of Nb-doped SrTiO3, in which a dilute concentration of electrons are doped into the d0 band insulator, by angle-resolved photoemission spectroscopy...
Kobayashi, M., Hwang, J. I., Song, G. S., Ooki, Y., Takizawa, M., Fujimori, A., ...
The electronic structure of Li-doped Ni$_{1-x}$Fe$_x$O has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The Ni $2p$ core-level PES and XAS spectra...
Depth profile photoemission study of thermally diffused Mn/GaAs (001) interfaces (2007)
Osafune, Y., Song, G. S., Hwang, J. I., Ishida, Y., Kobayashi, M., Ebata, K., ...
We have performed a depth profile study of thermally diffused Mn/GaAs (001) interfaces using photoemission spectroscopy combined with Ar$^+$-ion sputtering. We found that Mn ion was thermally...
Kobayashi, M., Ooki, Y., Takizawa, M., Song, G. S., Fujimori, A., Takeda, Y., ...
By means of photoemission and x-ray absorption spectroscopy, we have studied the electronic structure of (Ni,Zn,Fe,Ti)$_{3}$O$_{4}$ thin films, which exhibits a cluster glass behavior with a...
Okamoto, J., Okane, T., Saitoh, Y., Terai, K., Muramatsu, Y., ...
Ca_1-xSr_xRuO_3, which is ferromagnetic for Sr concentration x > 0.3, has been studied by x-ray magnetic circular dichroism (XMCD) in Ru 3p and O 1s core-level x-ray absorption. XMCD signals appear...
Ebata, K., Takizawa, M., Maekawa, K., Fujimori, A., Kuwahara, H., Tomioka, Y., ...
We have studied the chemical potential shift as a function of temperature in Nd$_{1-x}$Sr$_x$MnO$_3$ (NSMO) by measurements of core-level photoemission spectra. For ferromagnetic samples ($x=0.4$ and...
Ishida, Y., Kobayashi, M., Hwang, J. I., Takeda, Y., Okane, T., ...
We have performed x-ray magnetic circular dichroism (XMCD) and valence-band photoemission studies of the diluted ferromagnetic semiconductor Zn$_{1-x}$Cr$_x$Te. XMCD signals due to ferromagnetism...
Wadati, H., Maniwa, A., Chikamatsu, A., Ohkubo, I., Kumigashira, H., Oshima, M., ...
We have performed an {\it in-situ} photoemission study of Pr_{1-x}Ca_xMnO_3 (PCMO) thin films grown on LaAlO_3 (001) substrates and observed the effect of epitaxial strain on the electronic...
Ebata, K., Hashimoto, M., Tanaka, K., Fujimori, A., Tomioka, Y., Tokura, Y.
We have studied the temperature dependence of the photoemission spectra of Pr$_{1-x}$Ca$_x$MnO$_3$ (PCMO) with $x=0.25$, 0.3 and 0.5. For $x=0.3$ and 0.5, we observed a gap in the low-temperature...
Terai, K., Wadati, H., Kobayashi, M., Takizawa, M., Hwang, J. I., ...
Epitaxial Ba0.5Sr0.5TiO3 thin films were prepared on Nb-doped SrTiO3 (100)substrates by the pulsed laser deposition technique, and were studied by measuring the Ti 2p - 3d resonant photoemission...
Chikamatsu, A., Wadati, H., Kumigashira, H., Oshima, M., Fujimori, A., Lippmaa, M., ...
We report the first observation of changes in the electronic structure of La$_{1-x}$Sr$_{x}$MnO$_{3}$ (LSMO) across the filling-control metal-insulator (MI) transition by means of in situ...
Electron Doping of Cuprates via Interfaces with Manganites (2007)
Yunoki, S., Moreo, A., Dagotto, E., Okamoto, S., Kancharla, S. S., Fujimori, A.
The electron doping of undoped high-$T_c$ cuprates via the transfer of charge from manganites (or other oxides) using heterostructure geometries is here theoretically discussed. This possibility is...
Hard x-ray photoemission study of LaAlO3/LaVO3 multilayers (2007)
Wadati, H., Hotta, Y., Fujimori, A., Susaki, T., Hwang, H. Y., Takata, Y., ...
We have studied the electronic structure of multilayers composed of a band insulator LaAlO$_3$ (LAO) and a Mott insulator LaVO$_3$ (LVO) by means of hard x-ray photoemission spectroscopy, which has a...
Kobayashi, M., Tanaka, K., Fujimori, A., Ray, Sugata, Sarma, D. D.
With high-resolution photoemission spectroscopy measurements, the density of states (DOS) near the Fermi level ($E_\mathrm{F}$) of double perovskite Sr$_2$FeMoO$_6$ having different degrees of Fe/Mo...
Hwang, J. I., Kobayashi, M., Song, G. S., Fujimori, A., Tanaka, A., Yang, Z. S., ...
We have investigated the magnetic properties of a GaN/Ga1-xMnxN (x = 0.1) digital ferromagnetic heterostructure (DFH) showing ferromagnetic behavior using soft x-ray absorption spectroscopy (XAS) and...
Depth profile high-energy spectroscopic study of Mn-doped GaN prepared by thermal diffusion (2007)
Hwang, J. I., Osafune, Y., Kobayashi, M., Ebata, K., Ooki, Y., Ishida, Y., ...
We have performed an $in$-$situ$ depth profile study of Mn-doped GaN prepared by a low temperature thermal diffusion method using photoemission and x-ray absorption spectroscopy. It was revealed from...
Sarma, DD, Ray, Sugata, Tanaka, K, Kobayashi, M, Fujimori, A, Sanyal, P, ...
We present magnetization (M) and magnetoresistance (MR)data for a series of $Sr_2FeMoO_6$ samples with independent control on antisite defect and grain-boundary densities, which reveal several...
Ikeda, M., Yoshida, T., Fujimori, A., Kubota, M., Ono, K., Unozawa, K., ...
We have performed an angle-resolved photoemission study of the electron-doped high-Tc superconductors (HTSCs) Sm_{1.85}Ce_{0.15}CuO_{4} (SCCO) and Eu_{1.85}Ce_{0.15}CuO_{4} (ECCO). Around the nodal...
The hierarchy of multiple many-body interaction scales in high-temperature superconductors (2006)
Meevasana, W., Zhou, X. J., Sahrakorpi, S., Lee, W. S., Yang, W. L., Tanaka, K., ...
To date, angle-resolved photoemission spectroscopy has been successful in identifying energy scales of the many-body interactions in correlated materials, focused on binding energies of up to a few...
Distinct Fermi-Momentum Dependent Energy Gaps in Deeply Underdoped Bi2212 (2006)
Tanaka, Kiyohisa, Lee, W. S., Lu, D. H., Fujimori, A., Fujii, T., ...
We use angle-resolved photoemission spectroscopy applied to deeply underdoped cuprate superconductors Bi2Sr2(Ca,Y)Cu2O8 (Bi2212) to reveal the presence of two distinct energy gaps exhibiting...
Photoemission study of TiO2/VO2 interfaces (2006)
Maekawa, K., Takizawa, M., Wadati, H., Yoshida, T., Fujimori, A., Kumigashira, H., ...
We have measured photoemission spectra of two kinds of TiO$_2$-capped VO$_2$ thin films, namely, that with rutile-type TiO$_2$ (r-TiO$_2$/VO$_2$) and that with amorphous TiO$_2$ (a-TiO$_2$/VO$_2$)...
Hashimoto, M., Yoshida, T., Tanaka, K., Fujimori, A., Okusawa, M., Wakimoto, S., ...
We have performed a temperature-dependent angle-integrated photoemission study of lightly-doped to heavily-overdoped La$_{2-x}$Sr$_{x}$CuO$_4$ and oxygen-doped La$_2$CuO$_{4.10}$. We found that both...
Yoshida, T., Zhou, X. J., Lu, D. H., Komiya, Seiki, Ando, Yoichi, Eisaki, H., ...
We have performed a systematic angle-resolved photoemission spectroscopy (ARPES) study of the high-Tc cuprates La2-xSrxCuO4, ranging from the underdoped insulator to the superconductor to the...
Ishida, Y., Hwang, J. I., Kobayashi, M., Takeda, Y., Mamiya, K., Okamoto, J., ...
We performed a soft x-ray magnetic circular dichroism (XMCD) study of a Zn$_{1-x}$V$_x$O thin film which showed small ferromagnetic moment. Field and temperature dependences of V 2$p$ XMCD signals...
Electronic structure of the Mott insulator LaVO3 in a quantum well geometry (2006)
Hotta, Y., Wadati, H., Fujimori, A., Susaki, T., Hwang, H. Y.
We used x-ray photoemission spectroscopy to investigate the electronic structure of the Mott insulator LaVO3 embedded in LaAlO3. By limiting the upper layer of LaAlO3 to 3 unit cells, the underlying...
Ebata, K., Wadati, H., Takizawa, M., Fujimori, A., Chikamatsu, A., Kumigashira, H., ...
We have studied the chemical potential shift and changes in the electronic density of states near the Fermi level ($E_F$) as a function of carrier concentration in Pr$_{1-x}$Ca$_x$MnO$_3$ (PCMO, $0.2...
Non-local coherent screening in the bandwidth controlled Ca1-xSrxVO3 series (2006)
Mossanek, R. J. O., Abbate, M., Fujimori, A.
We studied the electronic structure of the Ca1-xSrxVO3 series using a cluster model. Both the coherent and incoherent structures in photoemission correspond to well screened states. The coherent...
Ishida, Y., Ohta, H., Hirano, M., Fujimori, A., Hosono, H.
We have performed a depth-profile analysis of an all-oxide p-n junction diode n-ZnO/p-NiO using photoemission spectroscopy combined with Ar-ion sputtering. Systematic core-level shifts were observed...
Photoemission from buried interfaces in SrTiO3/LaTiO3 superlattices (2006)
Takizawa, M., Wadati, H., Tanaka, K., Hashimoto, M., Yoshida, T., Fujimori, A., ...
We have measured photoemission spectra of SrTiO3/LaTiO3 superlattices with a topmost SrTiO3 layer of variable thickness. Finite coherent spectral weight with a clear Fermi cut-off was observed at...
Wadati, H., Yoshida, T., Chikamatsu, A., Kumigashira, H., Oshima, M., Eisaki, H., ...
Nowadays it has become feasible to perform angle-resolved photoemission spectroscopy (ARPES) measurements of transition-metal oxides with three-dimensional perovskite structures owing to the...
Wadati, H., Chikamatsu, A., Takizawa, M., Hashimoto, R., Kumigashira, H., Yoshida, T., ...
We have performed an angle-resolved photoemission spectroscopy study of La$_{0.6}$Sr$_{0.4}$FeO$_3$ using {\it in situ} prepared thin films and determined its band structure. The experimental band...
Okamoto, J., Okane, T., Fujimori, A., Abbate, M., Yoshii, S., ...
We have performed photoemission and soft x-ray absorption studies of pyrochlore-type Ru oxides, namely, the filling-control system Sm$_{2-x}$Ca$_x$Ru$_2$O$_7$ and the bandwidth-control system...
Mamiya, K., Koide, T., Fujimori, A., Tokano, H., Manaka, H., Tanaka, A., ...
Soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L2,3 edges of Co doped rutile TiO2 at room temperature have revealed clear multiplet features characteristic of ferromagnetic Co2+...
Yamasaki, T., Yamazaki, K., Ino, A., Arita, M., Namatame, H., Taniguchi, M., ...
Nodal quasiparticles of Bi2Sr2CaCu2O8 have been studied by angle-resolved photoemission spectroscopy with high momentum and energy resolution. Low-energy tunable photons have enabled us to resolve a...
Effect of Reducing Atmosphere on the Magnetism of Zn1-xCoxO Nanoparticles (2005)
Naeem, M., Hasanain, S. K., Kobayashi, M., Ishida, Y., Fujimori, A., Buzby, Scott, ...
We report the crystal structure and magnetic properties of Zn1-xCoxO nanoparticles synthesized by heating metal acetates in organic solvent. The nanoparticles were crystallized in wurtzite ZnO...
Orbital ordering in La$_{0.5}$Sr$_{1.5}$MnO$_4$ studied by model Hartree-Fock calculation (2005)
Ebata, K., Mizokawa, T., Fujimori, A.
We have investigated orbital ordering in the half-doped manganite La$_{0.5}$Sr$_{1.5}$MnO$_4$, which displays spin, charge and orbital ordering, by means of unrestricted Hartree-Fock calculations on...
Ishida, Y., Ohta, H., Fujimori, A., Hosono, H.
We have performed a temperature-dependent photoemission study of a NaxCoO2 (x~0.8) epitaxial thin film prepared by the reactive solid-phase epitaxy method. The chemical potential shift as a function...
Doping Evolution of the Underlying Fermi Surface in La2-xSrxCuO4 (2005)
Yoshida, T., Zhou, X. J., Tanaka, K., Yang, W. L., Hussain, Z., ...
We have performed a systematic doping dependent study of La$_{2-x}$Sr$_x$CuO$_4$ (LSCO) (0.03$\leq x \leq$0.3) by angle-resolved photoemission spectroscopy. In the entire doping range, the underlying...
Robust Ti4+ states in SrTiO3 layers of La0.6Sr0.4MnO3/SrTiO3/ La0.6Sr0.4MnO3 junctions (2005)
Kumigashira, H., Chikamatsu, A., Hashimoto, R., Oshima, M., Ohnishi, T., Lippmaa, M., ...
We have investigated the interfacial electronic structure of La0.6Sr0.4MnO3 (LSMO)/ SrTiO3 (STO)/ LSMO heterojunctions utilizing the elemental selectivity of photoemission spectroscopy. The Ti 2p...
Ghosh, Shankar, Kamaraju, N, Seto, M, Fujimori, A, Takeda, Y, Ishiwata, S, ...
Temperature-dependent micro-Raman studies of orthorhombic $CaFeO_{3}$ and rhombohedral $La_{0.33}Sr_{0.67}FeO_{3}$ were carried out with an aim to study the role of a lattice in the formation of the...
Valence changes associated with the metal-insulator transition in Bi$_{1-x}$La$_x$NiO$_3$ (2005)
Wadati, H., Takizawa, M., Tran, T. T., Tanaka, K., Mizokawa, T., Fujimori, A., ...
Perovskite-type BiNiO$_3$ is an insulating antiferromagnet in which a charge disproportionation occurs at the Bi site. La substitution for Bi suppresses the charge disproportionation and makes the...
Kobayashi, M., Ishida, Y., Hwang, J. L., Mizokawa, T., Fujimori, A., Mamiya, K., ...
We report on the results of x-ray absorption (XAS), x-ray magnetic circular dichroism (XMCD), and photoemission experiments on {\it n}-type Zn$_{1-x}$Co$_x$O ($x=0.05$) thin film, which shows...
Polaronic behavior of undoped high-Tc cuprates (2005)
Rösch, O., Gunnarsson, O., Zhou, X. J., Yoshida, T., Sasagawa, T., Fujimori, A., ...
We present angle-resolved photoemission spectroscopy (ARPES) data on undoped La2CuO4, indicating polaronic coupling between bosons and charge carriers. Using a shell model, we calculate the...
Yoshida, T., Tanaka, K., Yagi, H., Ino, A., Eisaki, H., Fujimori, A., ...
We have performed an angle-resolved photoemission study of the three-dimensional perovskite-type SrVO$_3$. Observed spectral weight distribution of the coherent part in the momentum space shows...
Hwang, J. I., Ishida, Y., Kobayashi, M., Hirata, H., Takubo, K., Mizokawa, T., ...
We have studied the electronic structure of the diluted magnetic semiconductor Ga$_{1-x}$Mn$_{x}$N ($x$ = 0.0, 0.02 and 0.042) grown on Sn-doped $n$-type GaN using photoemission and soft x-ray...
Chikamatsu, A., Wadati, H., Kumigashira, H., Oshima, M., Fujimori, A., Hamada, N., ...
We have performed an in situ angle-resolved photoemission spectroscopy (ARPES) on single-crystal surfaces of La$_{0.6}$Sr$_{0.4}$MnO$_{3}$ (LSMO) thin films grown on SrTiO$_{3}$ (001) substrates by...