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...
Image charge screening: a new approach to enhance magnetic ordering temperatures (2008)
Altieri, S., Finazzi, M., Hsieh, H. H., Haverkort, M. W., Chen, C. T., ...
We have tested the concept of image charge screening as a new approach to enhance magnetic ordering temperatures and superexchange interactions in ultra thin films. Using a 3 monolayer NiO(100) film...
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...
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...
Bulk electronic structure of the antiferromagnetic superconducting phase in ErNi2B2C (2007)
Baba, T., Yokoya, T., Tsuda, S., Kiss, T., Shimojima, T., Ishizaka, K., ...
We have performed temperature (T) - dependent laser-photoemission spectroscopy of antiferromagnetic (AF) superconductor ErNi2B2C to study the electronic-structure evolution reflecting the interplay...
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...
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...
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...
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...
Tsuda, S, Yokoya, T, Kiss, T, Shimojima, T, Shin, S, Togashi, T, ...
"Sub-meV" resolution photoemission spectroscopy was used to study carbon-substitution dependence of the multiple superconducting gap of Mg(B1-xCx)(2). Two features corresponding to sigma and pi gaps...
Direct observation of electron doping in La0.7Ce0.3MnO3 using x-ray absorption spectroscopy (2003)
Mitra, C., Hu, Z., Raychaudhuri, P., Wirth, S., Csiszar, S. I., Hsieh, H. H., ...
Cloud fields and concurrent dynamical structures associated with extratropical cyclones in a general circulation model are investigated with emphasis on the cool season (October-March). An ensemble...
Phase transition in LiVO2 studied by near-edge x-ray-absorption spectroscopy (1997)
Pen, H.F., Tjeng, L.H., Pellegrin, E., Sawatzky, G.A., Veenendaal, M.A. Van, ...
We present temperature-dependent V-2p and O-1s x-ray-absorption spectra of LiVO2. The aim of this study is to monitor changes in electronic structure on going through the phase transition. The...
Direct observation of Crmagnetic order in CoCrTa and CoCrPt thin films (1997)
Kemner, K.M., Idzerda, Y.U., Harris, V.G., Chakarian, C., Elam, W.T., Kao, C.C., ...
X-ray absorption spectroscopy of PrxY1-xBa2Cu3O7-y single crystals (1996)
Merz, M., Nücker, N., Pellegrin, E., Schuppler, S., Kielwein, M., Knupfer, M., ...
Distortions of x-ray absorption spectra measured with fluorescence yield (1995)
Sainctavit, Ph., Cartier, Ch., Chen, C.T.
The 2p X-ray absorption spectra of 3d transition metal compounds measured with fluorescene yield (FY) appear disorted. It is shown that this disortion is intrinsic to FY detection and not due to...
Cartier Dit Moulin, Ch., Flank, A.M., Rudolf, P., Chen, C.T.
Soft X-ray Absorption Spectroscopy at the transition metal L2,3 edges provides information about the 3d unoccupied states by dipole allowed transitions. We have recorded iron L2,3 edges in order to...
Magnetic circularly polarized 2p resonant photoemission of nickel (1993)
Tjeng, L.H., Chen, C.T., Rudolf, P., Meigs, G., Laan, G. Van Der, Thole, B.T.
We report the observation of two resonance channels in the 2p resonant photoemission of ferromagnetic nickel using circularly polarized soft x rays. By identifying the local 3d8 and 3d7...
Kuiper, Pieter, Searle, Barry G., Rudolf, Petra, Tjeng, L.H., Chen, C.T.
We report strong magnetic linear dichroism at the Fe L2,3 edge of the antiferromagnet Fe2O3 (hematite), The relative difference in absorption for light polarized parallel and perpendicular to the...
Rudolf, P., Sette, F., Tjeng, L.H., Meigs, G., Chen, C.T.
The magnetic moments of Gd and Fe in gadolinium iron garnet (Gd3Fe5O12) were probed at 77 and 300 K by soft-X-ray magnetic circular dichroism (SXMCD) measurements at the GdMa4,5 and at the FeL2,3...
Tjeng, L.H., Ldzerda, Y.U., Rudolf, P., Sette, F., Chen, C.T.
We demonstrate the feasibility of applying the novel soft-X-ray magnetic circular dichroism (SXMCD) technique to investigate the magnetic properties of magnetic surfaces and uitrathin films....
Ma, Y., Rudolf, P., Chen, C.T., Sette, F.
The questions of K–Si bonding and the K adsorption site of the K/Si(100)(2×1) surface system are studied by Si and K 2p core level photoabsorption and photoemission spectroscopy as a function of K...
Out-of-Plane Orbital Characters of Intrinsic and Doped Holes in La2–xSrxCuO4 (1992)
Chen, C.T., Tjeng, L.H., Kwo, J., Kao, H.L., Rudolf, P., Sette, F., ...
Bulk-sensitive, polarization-dependent O K- and Cu L-edge absorption spectra of single-domain La2–xSrxCuO4 with CuO2 planes tilted off the sample surface were measured. A novel experimental...
Electronic states and phases of KxC60 from photoemission and X-ray absorption spectroscopy (1991)
Chen, C.T., Tjeng, L.H., Rudolf, P., Meigs, G., Rowe, J.E., Chen, J., ...
High-resolution photoemission and soft X-ray absorption spectroscopies have provided valuable information on the electronic structure near the Fermi energy in the superconducting copper oxide...
Giant Cu 2p Resonances in CuO Valence-Band Photoemission (1991)
Tjeng, L.H., Chen, C.T., Ghijsen, J., Rudolf, P., Sette, F.
We report the observation of a giant resonance in the Cu 2p resonant-photoemission spectra of CuO. The study allows the unambiguous identification of the local Cu 3d8 configuration in the...
Multiple sulfur sites in the Cu(100)p(2×2)-S surface structure (1990)
Ma, Y., Rudolf, P., Chaban, E.E., Chen, C.T., Meigs, G., Sette, F.
High-resolution S 2p photoemission spectra of the saturated Cu(100)p(2×2)-S surface show multiple peaks, indicating that sulfur atoms adsorb on multiple sites. This result is related to the domain...
Two-dimensional condensation of potassium on Ag(001) (1990)
Modesti, S., Chen, C.T., Ma, Y., Meigs, G., Rudolf, P., Sette, F.
Temperature- and coverage-dependent soft-x-ray photoemission and photoabsorption studies on potassium-covered Ag(001) surfaces demonstrate the formation of potassium two-dimensional compressed...
Oxygen defect in YBa2Cu3Ox: An x-ray photoemission approach (1988)
Ford, W.K., Chen, C.T., Anderson, J., Kwo, J., Liou, Sy_Hwang, Hong, M., ...
A combined x-ray photoemission and diamagnetic-susceptibility study of YBa2Cu3Ox with x≃6 and 7 has been performed, with emphasis on the oxygen defect and the effect of heating in vacuum. By...
A study of the economic factors influencing apple prices / (1929)
Thesis (M.S.)--Virginia Polytechnic Institute, 1929.