Low energy excitations in CoO studied by temperature dependent x-ray absorption spectroscopy (2008)
Haverkort, M. W., Tanaka, A., Hu, Z., Hsieh, H. H., Chen, C. T., ...
We have measured the intricate temperature dependence of the Co L2,3 x-ray absorption spectra (2p-3d excitations) of CoO. To allow for accurate total electron yield measurements, the material has...
Ising magnetism and ferroelectricity in Ca$_3$CoMnO$_6$ (2008)
Wu, Hua, Burnus, T., Hu, Z., Martin, C., Maignan, A., Cezar, J. C., ...
The origin of both the Ising chain magnetism and ferroelectricity in Ca$_3$CoMnO$_6$ is studied by $ab$ $initio$ electronic structure calculations and x-ray absorption spectroscopy. We find that...
Atomic multiplet calculation of 3d_{5/2} -> 4f resonant x-ray diffraction from Ho metal (2008)
Haverkort, M. W., Schüßler-Langeheine, C., Chang, C. F., Buchholz, M., Ott, H., ...
We compare for Ho metal the x-ray absorption spectrum and the resonant soft x-ray diffraction spectra obtained at the $3d_{5/2} \to 4f$ ($M_5$) resonance for the magnetic 1st and 2nd order...
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...
X-ray absorption and x-ray magnetic dichroism study on Ca3CoRhO6 and Ca3FeRhO6 (2008)
Burnus, T., Hu, Z., Wu, Hua, Cezar, J. C., Niitaka, S., Takagi, H., ...
Using x-ray absorption spectroscopy at the Rh-L_2,3, Co-L_2,3, and Fe-L_2,3 edges, we find a valence state of Co^2+/Rh^4+ in Ca3CoRhO6 and of Fe^3+/Rh^3+ in Ca3FeRhO6. X-ray magnetic circular...
Crystal-field level inversion in lightly Mn-doped Sr3Ru2O7 (2008)
Hossain, M. A., Hu, Z., Haverkort, M. W., Burnus, T., Chang, C. F., Klein, S., ...
Sr3(Ru1-xMnx)2O7, in which 4d-Ru is substituted by the more localized 3d-Mn, is studied by x-ray dichroism and spin-resolved density functional theory. We find that Mn impurities do not exhibit the...
Anisotropic Susceptibility of La_2-xSr_xCoO_4 related to the Spin States of Cobalt (2008)
Hollmann, N., Haverkort, M. W., Cwik, M., Benomar, M., Reuther, M., Tanaka, A., ...
We present a study of the magnetic susceptibility of La_2-xSr_xCoO_4 single crystals in a doping range 0.3=0.5. This includes the pronounced kinks observed in the inverse magnetic susceptibility,...
Krug, I. P., Hillebrecht, F. U., Gomonaj, H., Haverkort, M., Tanaka, A., Tjeng, L. H., ...
We present a laterally resolved X-ray magnetic dichroism study of the magnetic proximity effect in a highly ordered oxide system, i.e. NiO films on Fe3O4(110). We found that the magnetic interface...
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...
Synthesis of assembled nanocrystalline Si dots film through the Langmuir-Blodgett technique (2008)
Tanaka, A., Tsuchiya, Yoshishige, Usami, K., Saito, S., Arai, T., Mizuta, Hiroshi, ...
High multipole transitions in NIXS: valence and hybridization in 4f systems (2007)
Gordon, R. A., Seidler, G. T., Fister, T. T., Haverkort, M. W., Sawatzky, G. A., Tanaka, A., ...
Momentum-transfer (q) dependent non-resonant inelastic x-ray scattering measurements were made at the N4,5 edges for several rare earth compounds. With increasing q, giant dipole resonances diminish,...
Hansmann, P., Severing, A., Hu, Z., Haverkort, M. W., Chang, C. F., Klein, S., ...
We infer that soft-x-ray absorption spectroscopy is a versatile method for the determination of the crystal-field ground state symmetry of rare earth Heavy Fermion systems, complementing neutron...
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...
Burnus, T., Hu, Z., Hsieh, H. H., Joly, V. L. J., Joy, P. A., Haverkort, M. W., ...
We have studied the local electronic structure of LaMn0.5Co0.5O3 using soft-x-ray absorption spectroscopy at the Co-L_3,2 and Mn-L_3,2 edges. We found a high-spin Co^{2+}--Mn^{4+} valence state for...
Influence of oxygen vacancy on the electronic structure of HfO$_2$ film (2007)
Cho, Deok-Yong, Lee, Jae-Min, Jang, Hoyoung, ...
We investigated the unoccupied part of the electronic structure of the oxygen-deficient hafnium oxide (HfO$_{\sim1.8}$) using soft x-ray absorption spectroscopy at O $K$ and Hf $N_3$ edges. Band-tail...
Non-resonant inelastic x-ray scattering involving excitonic excitations (2007)
Haverkort, M. W., Tanaka, A., Tjeng, L. H., Sawatzky, G. A.
In a recent publication Larson \textit{et al.} reported remarkably clear $d$-$d$ excitations for NiO and CoO measured with x-ray energies well below the transition metal $K$ edge. In this letter we...
Light emission from size reduced nanocrystal silicon quantum dots (2007)
Tanaka, A., Hippo, D., Usami, K., Tsuchiya, Yoshishige, Mizuta, Hiroshi, ...
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...
Nanocrystalline Si dot assembly based on the Langmuir-Blodgett method (2007)
Tanaka, A., Tsuchiya, Yoshishige, Usami, K., Saito, S., Arai, T., Mizuta, Hiroshi, ...
Burnus, T., Hu, Z., Haverkort, M. W., Cezar, J. C., Flahaut, D., Hardy, V., ...
We have investigated the valence, spin, and orbital state of the Co ions in the one-dimensional cobaltate Ca3Co2O6 using x-ray absorption and x-ray magnetic circular dichroism at the Co-L2,3 edges....
The spin state transition in LaCoO$_{3}$; revising a revision (2006)
Haverkort, M. W., Hu, Z., Cezar, J. C., Burnus, T., Hartmann, H., Reuther, M., ...
Using soft x-ray absorption spectroscopy and magnetic circular dichroism at the Co-$L_{2,3}$ edge we reveal that the spin state transition in LaCoO$_{3}$ can be well described by a low-spin ground...
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...
Orbitally driven spin-singlet dimerization in $S$=1 La$_{4}$Ru$_{2}$O$_{10}$ (2006)
Wu, Hua, Hu, Z., Burnus, T., Denlinger, J. D., Khalifah, P. G., Mandrus, D., ...
Using x-ray absorption spectroscopy at the Ru-$L_{2,3}$ edge we reveal that the Ru$^{4+}$ ions remain in the $S$=1 spin state across the rare 4d-orbital ordering transition and spin-gap formation. We...
Direct observation of t2g orbital ordering in magnetite (2006)
Schlappa, J., Schuessler-Langeheine, C., Chang, C. F., Ott, H., Tanaka, A., Hu, Z., ...
Using soft-x-ray diffraction at the site-specific resonances in the Fe L23 edge, we find clear evidence for orbital and charge ordering in magnetite below the Verwey transition. The spectra show...
Visible electroluminescence from size-controlled silicon quantum dots (2006)
Hippo, D., Tanaka, A., Usami, K., Tsuchiya, Y., Mizuta, Hiroshi, ...
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+...
Cold water coral mounds revealed (2006)
Williams, T., Kano, A., Ferdelman, T., Henriet, J-P., Abe, K., Andres, M., ...
High-density assembly of nanocrystalline silicon quantum dots (2006)
Tanaka, A., Yamahata, G., Tsuchiya, Y., Usami, K., Mizuta, Hiroshi, Oda, S.
Orbital-assisted metal-insulator transition in VO$_{2}$ (2005)
Haverkort, M. W., Hu, Z., Tanaka, A., Reichelt, W., Streltsov, S. V., Korotin, M. A., ...
We found direct experimental evidence for an orbital switching in the V 3d states across the metal-insulator transition in VO$_{2}$. We have used soft-x-ray absorption spectroscopy at the V $L_{2,3}$...
Formation of nanocrystalline silicon quantum dot arrays (2005)
Tanaka, A., Yamahata, G., Tsuchiya, Y., Usami, K., Mizuta, Hiroshi, Oda, S.
Bottom-up fabrication of Si nanodot transistors usign the nc-Si dots solution (2005)
Yamahata, G., Tanaka, A., Kawata, Y., Tsuchiya, Y., Saito, S., Arai, T., ...
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...
Controlling orbital moment and spin orientation in CoO layers by strain (2005)
Csiszar, S. I., Haverkort, M. W., Hu, Z., Tanaka, A., Hsieh, H. H., ...
We have observed that CoO films grown on different substrates show dramatic differences in their magnetic properties. Using polarization dependent x-ray absorption spectroscopy at the Co L$_{2,3}$...
Aligning spins in antiferromagnetic films using antiferromagnets (2005)
Csiszar, S. I., Haverkort, M. W., Burnus, T., Hu, Z., Tanaka, A., Hsieh, H. H., ...
We have explored the possibility to orient spins in antiferromagnetic thin films with low magnetocrystalline anisotropy via the exchange coupling to adjacent antiferromagnetic films with high...
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...
Spectroscopy of stripe order in La1.8Sr0.2NiO4 using resonant soft x-ray diffraction (2005)
Schuessler-Langeheine, C., Schlappa, J., Tanaka, A., Hu, Z., Chang, C. F., Schierle, E., ...
Strong resonant enhancements of the charge-order and spin-order superstructure-diffraction intensities in La1.8Sr0.2NiO4 are observed when x-ray energies in the vicinity of the Ni L2,3 absorption...
High-Density Assembly of Nanocrystalline Silicon Quantum Dots (2005)
Tanaka, A., Tsuchiya, Y., Usami, K., Mizuta, Hiroshi, Oda, S.
Zushi, H, Nakamura, K, Hanada, K, Sato, KN, Sakamoto, M, Idei, H, ...
Assembly of Nanocrystalline Silicon Quantum Dots based on a Colloidal Solution Method (2005)
Tanaka, A., Yamahata, G., Tsuchiya, Y., Usami, K., Mizuta, Hiroshi, Oda, S.
High-density assembly of nanocrystalline silicon quantum dots (2005)
Tanaka, A., Tsuchiya, Yoshishige, Usami, K., Mizuta, Hiroshi, Oda, S.
Macroscopic quantum tunneling in a d-wave high-Tc superconductor (2004)
Inomata, K., Sato, S., Nakajima, K., Tanaka, A., Takano, Y., Wang, H. B., ...
There is a wide recognition that Josephson-junction-like structures intrinsic to the layered cuprate high temperature superconductors offer an attractive stage for exploiting possible applications to...
Orbital Symmetry and Electron Correlation in Na_{x}CoO_2 (2004)
Wu, W. B., Huang, D. J., Okamoto, J., Tanaka, A., Chou, F. C., ...
Measurements of polarization-dependent soft x-ray absorption reveal that the electronic states determining the low-energy excitations of Na$_{x}$CoO$_2$ have predominantly $a_{1g}$ symmetry with...
Quark Confinement Physics from Quantum Chromodynamics (2004)
Suganuma, H., Amemiya, K., Tanaka, A., Ichie, H.
We show the construction of the dual superconducting theory for the confinement mechanism from QCD in the maximally abelian (MA) gauge using the lattice QCD Monte Carlo simulation. We find that...
Yaji, K., Kimura, A., Hirai, C., Taniguchi, M., Koyama, M., Sato, H., ...
Cr 2p core excited XAS and XMCD spectra of ferromagnetic Cr$_{1-\delta}$Te with several concentrations of $\delta$=0.11-0.33 and ferrimagnetic Cr$_{5}$S$_{6}$ have been measured. The observed XMCD...
Different look at the spin state of Co3+ ions in a CoO5 pyramidal coordination (2004)
Hu,Z., Wu,H., Haverkort,M. W., Hsieh,H. H., Lin,H. J., Lorenz,T., ...
Determination of the orbital moment and crystal field splitting in LaTiO$_{3}$ (2004)
Haverkort, M. W., Hu, Z., Tanaka, A., Ghiringhelli, G., Roth, H., Cwik, M., ...
Utilizing a sum-rule in a spin-resolved photoelectron spectroscopic experiment with circularly polarized light, we show that the orbital moment in LaTiO$_3$ is strongly reduced both below and above...
Nagata, N., Satoh, S., Tanaka, R., Tanaka, A., 田中, 亮一
Chlorophyll b is a photosynthetic antenna pigment found in prochlorophytes and chlorophytes. In chlorophytes, its biosynthesis regulates the photosynthetic antenna size. Chlorophyll b is synthesized...
Nagata, N., Satoh, S., Tanaka, R., Tanaka, A.
Chlorophyll b is a photosynthetic antenna pigment found in prochlorophytes and chlorophytes. In chlorophytes, its biosynthesis regulates the photosynthetic antenna size. Chlorophyll b is synthesized...
Nagata, N., Satoh, S., Tanaka, R., Tanaka, A.
Chlorophyll b is a photosynthetic antenna pigment found in prochlorophytes and chlorophytes. In chlorophytes, its biosynthesis regulates the photosynthetic antenna size. Chlorophyll b is synthesized...
Formation of an Ordered Array of nc-Si Dots by Using a Solution Droplet Evaporation Method (2004)
Tsuchiya, Y., Iwasa, T., Tanaka, A., Usami, K., Mizuta, Hiroshi, Oda, S.
Different look at the spin state of Co3+ ions in a CoO5 pyramidal coordination (2004)
Hu, Z., Wu, H., Haverkort, M. W., Hsieh, H. H., Lin, H. J., Lorenz, T., ...
Nature of Orbital Ordering in La_0.5Sr_1.5MnO_4 is Studied by Soft X-ray Linear Dichroism (2003)
Huang, D. J., Wu, W. B., Guo, G. Y., Lin, H-J, Hou, T. Y., Chang, C. F., ...
We found that the conventional model of orbital ordering of 3x^2-r^2/3y^2-r^2 type in the eg states of La_0.5Sr_1.5MnO_4 is incompatible with measurements of linear dichroism in the Mn 2p-edge x-ray...
Tezuka, Y., Kanai, K., Ishii, H., Shin, S., Nozawa, S., Tanaka, A., ...
Resonant inverse photoemission spectra of Ni metal have been obtained across the Ni 3$p$ absorption edge. The intensity of Ni 3$d$ band just above Fermi edge shows asymmetric Fano-like resonance....
Tanaka, R, Hirashima, M, Satoh, S, Tanaka, A, 田中, 亮一
This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Plant and Cell Physiology following peer review. The definitive publisher-authenticated version Oxford...
Tanaka, R, Hirashima, M, Satoh, S, Tanaka, A
Oxygenation of pheophorbide a is a key step in chlorophyll breakdown. Several biochemical studies have implicated that this step was catalyzed by an iron-containing and ferredoxin-dependent...
Tanaka, R, Hirashima, M, Satoh, S, Tanaka, A
Oxygenation of pheophorbide a is a key step in chlorophyll breakdown. Several biochemical studies have implicated that this step was catalyzed by an iron-containing and ferredoxin-dependent...
Magnetic versus crystal field linear dichroism in NiO thin films (2003)
Haverkort, M. W., Csiszar, S. I., Hu, Z., Altieri, S., Tanaka, A., Hsieh, H. H., ...
We have detected strong dichroism in the Ni $L_{2,3}$ x-ray absorption spectra of monolayer NiO films. The dichroic signal appears to be very similar to the magnetic linear dichroism observed for...
A different look at the spin state of Co$^{3+}$ ions in CoO$_{5}$ pyramidal coordination (2003)
Hu, Z., Wu, Hua, Haverkort, M. W., Hsieh, H. H., Lorenz, T., ...
Using soft-x-ray absorption spectroscopy at the Co-$L_{2,3}$ and O-$K$ edges, we demonstrate that the Co$^{3+}$ ions with the CoO$_{5}$ pyramidal coordination in the layered Sr$_2$CoO$_3$Cl compound...
Soft X-ray magnetic circular dichroism study of the ferromagnetic Cr$_{1-\delta}$Te (2003)
Yaji, K., Kimura, A., Hirai, C., Sato, H., Taniguchi, M., Koyama, M., ...
The 2p core excited XAS and XMCD spectra of Cr$_{1-\delta}$Te with several concentrations of $\delta$=0.11-0.33 have been measured. The observed XMCD lineshapes are found to very weakly depend on...
Ikeda, Y., Ohki, S., Koizumi, K., Tanaka, A., Watanabe, H., Kohno, H., ...