Okawa, M., Ishizaka, K., Uchiyama, H., Tadatomo, H., Masui, T., Tajima, S., ...
Low energy structure of optimally doped YBa2Cu3O7-delta is investigated using laser-excited angle-resolved photoemission spectroscopy. The surface state and the CuO chain band that usually overlap...
Matsunami, M., Chainani, A., Taguchi, M., Eguchi, R., Ishida, Y., Takata, Y., ...
Hard x-ray photoemission and optical spectroscopies have been performed on YbS and Yb metal to determine the precise $f$-electron occupation. A comparison of the photoemission spectra with the energy...
Recoil Effect of Photoelectrons in the Fermi-Edge of Simple Metals (2008)
Takata, Y., Kayanuma, Y., Oshima, S., Tanaka, S., Yabashi, M., Tamasaku, K., ...
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 using synchrotron...
Right-handed or left-handed ? Forbidden X-ray diffraction reveals chirality (2008)
Tanaka, Y, Takeuchi, T, Lovesey, SW, Knight, KS, Chainani, A, Takata, Y, ...
Coherent and Incoherent States of Electron-doped SrTiO3 (2007)
Ishida, Y., Eguchi, R., Matsunami, M., Horiba, K., Taguchi, M., Chainani, A., ...
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 the incoherent...
Ishizaka, K., Kiss, T., Izumi, S., Okawa, M., Shimojima, T., Chainani, A., ...
We investigate the doping dependent low energy, low temperature ($T$ = 5 K) properties of nodal quasiparticles in the d-wave superconductor Bi$_{2.1}$Sr$_{1.9}$CaCu$_2$O$_{8+\delta}$ (Bi2212). By...
Revisiting the valence-band and core-level photoemission spectra of NiO (2007)
Taguchi, M., Matsunami, M., Ishida, Y., Eguchi, R., Chainani, A., Takata, Y., ...
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 lowest energy state...
Ishizaka, K., Eguchi, R., Tsuda, S., Yokota, T., Chainani, A., Kiss, T., ...
We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear...
Hard X-ray Cu $2p$ Core-Level Photoemission of High-$T_c$ Cuprate Superconductors (2006)
Taguchi, M., Matsunami, M., Chainani, A., Horiba, K., Takata, Y., Yamamoto, K., ...
We have performed a detailed study of Cu $2p$ core-level spectra in single layer La$_{2-x}$Sr$_{x}$CuO$_{4}$, La doped Bi$_2$Sr$_{1.6}$La$_{0.4}$CuO$_{6+\delta}$ (Bi2201) and bilayer...
Photoemission evidence for a Mott-Hubbard metal-insulator transition in VO$_2$ (2006)
Eguchi, R., Taguchi, M., Matsunami, M., Horiba, K., Yamamoto, K., Ishida, Y., ...
The temperature ($T$) dependent metal-insulator transition (MIT) in VO$_2$ is investigated using bulk sensitive hard x-ray ($\sim$ 8 keV) valence band, core level, and V 2$p-3d$ resonant...
Shimojima, T., Ishizaka, K., Tsuda, S., Kiss, T., Yokoya, T., Chainani, A., ...
Cobalt oxide superconductor NaxCoO2.yH2O is studied by angle-resolved photoemission spectroscopy (ARPES). We report the Fermi surface (FS) topology and electronic structure near the Fermi level (EF)...
Horiba, K., Eguchi, R., Taguchi, M., Chainani, A., Kikkawa, A., Senba, Y., ...
We investigate the electronic structure of high-quality single-crystal LaNiO$_3$ (LNO) thin films using in situ photoemission spectroscopy (PES). The in situ high-resolution soft x-ray PES...
Matsunami, M., Horiba, K., Taguchi, M., Yamamoto, K., Chainani, A., Takata, Y., ...
Semiconducting skutterudite CeFe$_4$P$_{12}$ is investigated by synchrotron x-ray photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). Ce 3$d$ core-level PES and 3$d-4f$ XAS, in...
Based on experimental observations in A{x}MO{2} (A = Na, Li; M = Co, Ni), a model for suppression of magnetic frustration by electron doping in a nearest-neighbour antiferromagnetic triangular...
Yamamoto, K., Horiba, K., Taguchi, M., Matsunami, M., Kamakura, N., Chainani, A., ...
We study the mixed valence transition ($T$$_{v}$ $\sim$80 K) in EuNi$_{2}$(Si$_{0.2}$Ge$_{0.8}$)$_{2}$ using Eu 3$d-4f$ X-ray absorption spectroscopy (XAS) and resonant photoemission spectroscopy...
Temperature dependent Luttinger surfaces (2005)
Ito, T., Chainani, A., Haruna, T., Kanai, K., Yokoya, T., Shin, S., ...
The Luttinger surface of an organic metal (TTF-TCNQ), possessing charge order and spin-charge separation, is investigated using temperature dependent angle-resolved photoemission spectroscopy. The...
Eguchi, R., Kiss, T., Tsuda, S., Shimojima, T., Mizokami, T., Yokoya, T., ...
We study the electronic structure of Mott-Hubbard systems SrVO$_{3}$ and CaVO$_3$ with bulk and surface-sensitive high-resolution photoemission spectroscopy (PES), using a VUV laser, synchrotron...
Role of CDW fluctuations on the spectral function in a metallic CDW system (2005)
Yokoya, T., Kiss, T., Chainani, A., Shin, S., Yamaya, K.
Angle-resolved photoemission spectroscopy of ZrTe3 has been performed from room temperature(T) down to 6 K (across Tcdw = 63K) to study the charge-density-wave (CDW) fluctuation effects in a metallic...
Evidence for suppressed metallicity on the surface of La2-xSrxCuO4 and Nd2-xCexCuO4 (2005)
Taguchi, M., Chainani, A., Horiba, K., Takata, Y., Yabashi, M., Tamasaku, K., ...
Hard X-ray Photoemission spectroscopy (PES) of copper core electronic states, with a probing depth of $\sim$60 \AA, is used to show that the Zhang-Rice singlet feature is present in La$_2$CuO$_4$ but...
Takeuchi, T., Harada, Y., Tokushima, T., Taguchi, M., Takata, Y., Chainani, A., ...
We study the electronic structure of the recently discovered diluted magnetic semiconductor Ga$_{1-x}$Cr$_{x}$N ($x$ = 0.01-0.10). A systematic study of the changes in the $occupied$ and $unoccupied$...
Shimojima, T., Yokoya, T., Kiss, T., Chainani, A., Shin, S., Togashi, T., ...
We have studied the temperature-dependent electronic structure near the Fermi level (EF) of the layered cobaltate superconductor, Na0.35CoO2.1.3H2O, and related materials, using laser-excited...
Horiba, K., Taguchi, M., Chainani, A., Takata, Y., Ikenaga, E., Namatame, H., ...
Using hard x-ray (HX ; $h\nu$ = 5.95 keV) synchrotron photoemission spectroscopy (PES), we study the intrinsic electronic structure of La$_{1-x}$Sr$_x$MnO$_3$ (LSMO) thin films. Comparison of Mn 2$p$...
Bulk screening in core level photoemission from Mott-Hubbard and Charge-Transfer systems (2004)
Taguchi, M., Chainani, A., Kamakura, N., Horiba, K., Takata, Y., Ikenaga, E., ...
We report bulk-sensitive hard X-ray ($h\nu$ = 5.95 KeV) core level photoemission spectroscopy (PES) of single crystal V$_{1.98}$Cr$_{0.02}$O$_{3}$ and the high-$T_c$ cuprate...
Bulk Electronic structure of Na$_{0.35}$CoO$_{2}$.1.3H$_{2}$O (2003)
Chainani, A., Yokoya, T., Takata, Y., Tamasaku, K., Taguchi, M., Shimojima, T., ...
High-energy (h$\nu$ = 5.95 keV) synchrotron Photoemission spectroscopy (PES) is used to study bulk electronic structure of Na$_{0.35}$CoO$_{2}$.1.3H$_{2}$O, the layered superconductor. In contrast to...
Layer dependent band dispersion and correlations using tunable Soft X-ray ARPES (2003)
Kamakura, N., Takata, Y., Tokushima, T., Harada, Y., Chainani, A., Kobayashi, K., ...
Soft X-ray Angle-Resolved Photoemission Spectroscopy is applied to study in-plane band dispersions of Nickel as a function of probing depth. Photon energies between 190 and 780 eV were used to...
Hidden Charge-Density-Wave Order in a Low-Tc Superconductor 2H-NbSe2 (2003)
Kiss, T., Yokoya, T., Chainani, A., Shin, S., Hanaguri, T., Nohara, M., ...
The Charge-density-wave(CDW) in 2H-NbSe2(TCDW ~ 33 K), which coexists with superconductivity(Tc = 7.2 K), is investigated using Angle-resolved photoemission spectroscopy as a function of temperature....
Chainani, A., Yokoya, T., Kiss, T., Shin, S., Nishio, T., Uwe, H.
We study the single particle density of states (DOS) across the superconducting transition (Tc = 31 K) in single-crystal Ba0.67K0.33BiO3 using ultrahigh resolution angle-integrated photoemission...
Disorder Effects in Electronic Structure of Substituted Transition Metal Compounds (1998)
Sarma, DD, Chainani, A, Krishnakumar, SR, Vescovo, E, Carbone, C, Eberhardt, W, ...
Investigating $LaN_{2-x}M_xO_3$ (M Mn and Fe), we identify a characteristic evolution of the spectral function with increasing disorder in the presence of strong interaction effects across the...
Disorder effects in electronic structure of substituted transition metal compounds (1998)
Sarma, D. D., Chainani, A., Krishnakumar, S. R., Vescovo, E., Carbonei, C., Eberhardt, W., ...
Investigating LaNi(1-x)M(x)O3 (M = Mn and Fe), we identify a characteristic evolution of the spectral function with increasing disorder in presence of strong interaction effects across the...
Disorder Effects in Electronic Structure of Substituted Transition Metal Compounds (1998)
Sarma, DD, Chainani, A, Krishnakumar, SR, Vescovo, E, Carbone, C, Eberhardt, W, ...
Investigating $LaN_{2-x}M_xO_3$ (M Mn and Fe), we identify a characteristic evolution of the spectral function with increasing disorder in the presence of strong interaction effects across the...
Low-temperature electrical conductivity of $LaNi_{1-x}Fe_xO_3$ (1996)
Chainani, A, Sarma, DD, Das, I, Sampathkumaran, EV
We report the electrical conductivity between 2 and 300 K for $LaNi_{1-x}Fe_xO_3$ across the composition-controlled metal–insulator (m–i) transition. Using a method first suggested by Mobius, we...
Low-temperature electrical conductivity of $LaNi_{1-x}Fe_xO_3$ (1996)
Chainani, A, Sarma, DD, Das, I, Sampathkumaran, EV
We report the electrical conductivity between 2 and 300 K for $LaNi_{1-x}Fe_xO_3$ across the composition-controlled metal–insulator (m–i) transition. Using a method first suggested by Mobius, we...
The large magnetoresistance of $La_{1-x}Sr_xCoO_3$ at low temperatures (1995)
Mahendiran, R, Raychaudhuri, AK, Chainani, A, Sarma, DD
We report here the resistivity $(\rho)$ and the magnetoresistance (MR) ofthe ferromagnetic perovsldte oxide system $La_{1-x}Sr_xCaO_3 (0.1
Mahendiran, R, Raychaudhuri, AK, Chainani, A, Sarma, DD
Alinear magnetic field sensor for low temperature $(T\leq60 K)$ use based on magnetoresistance of the perovskite oxide material $La_{0.7}Sr_{0.3}Co0_3$ is reported. The magnetoresistance is negative...
Mahendiran, R, Raychaudhuri, AK, Chainani, A, Sarma, DD
Alinear magnetic field sensor for low temperature $(T\leq60 K)$ use based on magnetoresistance of the perovskite oxide material $La_{0.7}Sr_{0.3}Co0_3$ is reported. The magnetoresistance is negative...
The large magnetoresistance of $La_{1-x}Sr_xCoO_3$ at low temperatures (1995)
Mahendiran, R, Raychaudhuri, AK, Chainani, A, Sarma, DD
We report here the resistivity $(\rho)$ and the magnetoresistance (MR) ofthe ferromagnetic perovsldte oxide system $La_{1-x}Sr_xCaO_3 (0.1
We study the electronic structure of the $LaMO_3$ (M = Ti-Ni) perovskite oxides as probed by various high-energy electron spcctroscopics. These spcctroscopic studies, in conjunction with model...
Sarma, DD, Rader, O, Kachel, T, Chainani, A, Mathew, M, Holldack, K, ...
We report x-ray absorption spectra at the oxygen K edge for $LaNi_{1-x}M_xO_3$ (M = Mn, Fe and Co ) for values of x spanning the entire composition range which exhibit metal-insulator transitions at...
Covalency-driven unusual metal-insulator transition in nickelates (1994)
Barman, SR, Chainani, A, Sarma, DD
Electronic structures of metallic $LaNiO_3$ and insulating $NdNiO_3$ are investigated using electron spectroscopies as well as band-structure and model-Hamiltonian calculations. It is shown that...
We study the electronic structure of the $LaMO_3$ (M = Ti-Ni) perovskite oxides as probed by various high-energy electron spcctroscopics. These spcctroscopic studies, in conjunction with model...
Covalency-driven unusual metal-insulator transition in nickelates (1994)
Barman, SR, Chainani, A, Sarma, DD
Electronic structures of metallic $LaNiO_3$ and insulating $NdNiO_3$ are investigated using electron spectroscopies as well as band-structure and model-Hamiltonian calculations. It is shown that...
Sarma, DD, Rader, O, Kachel, T, Chainani, A, Mathew, M, Holldack, K, ...
We report x-ray absorption spectra at the oxygen K edge for $LaNi_{1-x}M_xO_3$ (M = Mn, Fe and Co ) for values of x spanning the entire composition range which exhibit metal-insulator transitions at...
Sarma, DD, Barman, SR, Cimino, R, Carbone, C, Sen, P, Roy, A, ...
We estimate the relative contributions of the decay channels arising from various Coster-Kronig (CK) and initial-state shake processes to the satellite intensity accompanying the $_L_2-$ and...
Electrical resistivity anomalies in the perovskites $La_{1-x}Sr_xMnO_3$ (1993)
Chainani, A, Mathew, M, Sarma, DD, Das, I, Sampathkumaran, EV
The temperature dependence of the resistivity of $La_{1-x}Sr_xMnO_3$ indicates that the samples are semiconducting for x=0.0 and 0.1, but metallic for $x \geq 0.2$ at lower temperatures. The metallic...
Sarma, DD, Barman, SR, Cimino, R, Carbone, C, Sen, P, Roy, A, ...
We estimate the relative contributions of the decay channels arising from various Coster-Kronig (CK) and initial-state shake processes to the satellite intensity accompanying the $_L_2-$ and...
Electron-spectroscopy study of the semiconductor-metal transition in $La_{1-x}Sr_xCoO_3$ (1992)
Chainani, A, Mathew, M, Sarma, DD
A study of the semiconductor-metal transition in the series $La_{1-x}Sr_xCoO_3$, x=0.0–0.4, using electron-spectroscopy techniques is presented. The results show that the ground state of $LaCoO_3$...
Photoemission study of porous silicon (1992)
Roy, A, Chainani, A, Sarma, DD, Sood, AK
We report x-ray photoelectron spectra from a porous silicon film (PSF) with a photoluminescence peak at 1.8 eV, as a function of argon ion etching time to probe the composition in the surface and the...
Electron-spectroscopy study of the semiconductor-metal transition in $La_{1-x}Sr_xCoO_3$ (1992)
Chainani, A, Mathew, M, Sarma, DD
A study of the semiconductor-metal transition in the series $La_{1-x}Sr_xCoO_3$, x=0.0–0.4, using electron-spectroscopy techniques is presented. The results show that the ground state of $LaCoO_3$...
Electrical resistivity anomalies in the perovskites $La_{1-x}Sr_xMnO_3$ (1992)
Chainani, A, Mathew, M, Sarma, DD, Das, I, Sampathkumaran, EV
The temperature dependence of the resistivity of $La_{1-x}Sr_xMnO_3$ indicates that the samples are semiconducting for x=0.0 and 0.1, but metallic for $x \geq 0.2$ at lower temperatures. The metallic...
Photoemission study of porous silicon (1992)
Roy, A, Chainani, A, Sarma, DD, Sood, AK
We report x-ray photoelectron spectra from a porous silicon film (PSF) with a photoluminescence peak at 1.8 eV, as a function of argon ion etching time to probe the composition in the surface and the...
Calculated oxygen 1s core-level photoemission spectra from cuprate superconductors (1991)
The observed O 1s X-ray photoemission spectra of the cuprate superconductors often exhibit a satellite at a higher binding energy to the main peak. The origin of this satellite is not fully...
Calculated oxygen 1s core-level photoemission spectra from cuprate superconductors (1991)
The observed O 1s X-ray photoemission spectra of the cuprate superconductors often exhibit a satellite at a higher binding energy to the main peak. The origin of this satellite is not fully...
Using the configuration-interaction approach, we calculate the oxygen Is core-level photoemission spectra for various values of interaction strengths representing different metal-oxide systems. The...
Using the configuration-interaction approach, we calculate the oxygen Is core-level photoemission spectra for various values of interaction strengths representing different metal-oxide systems. The...