Xie, B. P., Zhu, L. F., Yang, K., Zhou, B., Hiraoka, N., Cai, Y. Q., ...
The state-resolved differential cross sections for both the 1s2 1S0 - 1s2s 1S0 monopolar transition and the 1s2 1S0 - 1s2p 1P1 dipolar transition of atomic helium have been measured over a large...
The orbital characters of bands in iron-based superconductor BaFe1.85Co0.15As2 (2009)
Zhang, Y., Zhou, B., Chen, F., Wei, J., Xu, M., Yang, L. X., ...
Multiple 3d orbitals contribute to the low energy electronic structure in the newly discovered iron-based superconductors. The specific orbital characters of the multi-bands are crucial in...
Zhang, L., Fujita, T., Chen, F., Feng, D. L., Maekawa, S., Chen, M. W.
Raman spectra of polycrystalline NdFeAsO1-xFx (x=0.0, 0.1, 0.2) compound have been systematically investigated as functions of temperature and fluorine concentration. Scanning electron microscopic...
Zhang, Y., Wei, J., Ou, H. W., Zhao, J. F., Zhou, B., Chen, F., ...
The nature of spin-density wave and its relation with superconductivity are crucial issues in the newly discovered Fe-based high temperature superconductors. Particularly it is unclear whether the...
Yang, L. X., Zhang, Y., Ou, H. W., Zhao, J. F., Shen, D. W., Zhou, B., ...
The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the electronic...
Ou, H. W., Zhao, J. F., Zhang, Y., Xie, B. P., Shen, D. W., Zhu, Y., ...
The misfit oxide, Bi$_{2}$Ba$_{1.3}$K$_{0.6}$Co$_{2.1}$O$_{y}$, made of alternating rocksalt-structured [BiO/BaO] layers and hexagonal CoO$_{2}$ layers, was studied by angle-resolved photoemission...
Primary role of the barely occupied states in the charge density wave formation of NbSe2 (2008)
Shen, D. W., Zhang, Y., Yang, L. X., Wei, J., Ou, H. W., Dong, J. K., ...
NbSe2 is a prototypical charge-density-wave (CDW) material, whose mechanism remains mysterious so far. With angle resolved photoemission spectroscopy, we mapped out the CDW gap and recovered the...
Ou, H. W., Zhang, Y., Zhao, J. F., Wei, J., Shen, D. W., Zhou, B., ...
We investigated the temperature dependence of the density-of-states in the iron-based superconductor SmO_1-xF_xFeAs (x=0, 0.12, 0.15, 0.2) with high resolution angle-integrated photoemission...
Liu, R. H., Wu, G., Wu, T., Fang, D. F., Chen, H., Li, S. Y., ...
The magnetic fluctuations associated with a quantum critical point (QCP) are widely believed to cause the non-Fermi liquid behaviors and unconventional superconductivities, for example, in heavy...
Angle integrated photoemission study of SmO$_{0.85}$F$_{0.15}$FeAs (2008)
Ou, H. W., Zhao, J. F., Zhang, Y., Shen, D. W., Zhou, B., Yang, L. X., ...
The electronic structure of the new superconductor, SmO$_{1-x}$F$_x$FeAs ($x=0.15$), has been studied by angle-integrated photoemission spectroscopy. Our data show a sharp feature very close to the...
Wei, J., Zhang, Y., Ou, H. W., Xie, B. P., Shen, D. W., Zhao, J. F., ...
Angle resolved photoemission spectroscopy study is reported on a high quality optimally doped Bi2Sr1.6La0.4CuO6+delta high Tc superconductor. In the antinodal region with maximal d-wave gap, the...
Evolution of the Electronic Structure of 1T-CuxTiSe2 (2006)
Zhao, J. F., Ou, H. W., Wu, G., Xie, B. P., Zhang, Y., Shen, D. W., ...
The electronic structure of a new charge-density-wave/ superconductor system, 1T-CuxTiSe2, has been studied by photoemission spectroscopy. A correlated semiconductor band structure is revealed for...
A novel mechanism of charge density wave in a transition metal dichalcogenide (2006)
Shen, D. W., Xie, B. P., Zhao, J. F., Yang, L. X., Fang, L., Shi, J., ...
Charge density wave, or CDW, is usually associated with Fermi surfaces nesting. We here report a new CDW mechanism discovered in a 2H-structured transition metal dichalcogenide, where the two...
Inelastic X-Ray Scattering Study of Exciton Properties in an Organic Molecular crystal (2006)
Yang, K., Chen, L. P., Cai, Y. Q., Hiraoka, N., Li, S., Zhao, J. F., ...
Excitons in a complex organic molecular crystal were studied by inelastic x-ray scattering (IXS) for the first time. The dynamic dielectric response function is measured over a large momentum...
High-energy scale revival and giant kink in the dispersion of a cuprate superconductor (2006)
Xie, B. P., Yang, K., Shen, D. W., Zhao, J. F., Ou, H. W., Wei, J., ...
In the present photoemission study of a cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta, we discovered a large scale dispersion of the lowest band, which unexpectedly follows the band structure...
Yang, K., Xie, B. P., Shen, D. W., Zhao, J. F., Ou, H. W., Wei, J., ...
We explore the electronic structure in the heavily overdoped regime of the single layer cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta. We found that the nodal quasiparticle behavior is...
Spatially modulated "Mottness" in La2-xBaxCuO4 (2005)
Abbamonte, P., Rusydi, A., Smadici, S., Gu, G. D., Sawatzky, G. A., Feng, D. L.
Stripe phases were predicted to arise in doped antiferromagnets through competition between magnetism and the kinetic energy of mobile carriers (typically holes). In copper-oxides the main...
The implementation of global non-analytical fit is exemplified by its application to the spectral analysis of the complex lineshape of Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ at $(\pi,0)$. It deals with...
Zooming-in on the charge ordering in YBa2Cu3O6.5 (2004)
Feng, D. L., Rusydi, A., Abbamonte, P., Venema, L., Elfimov, I., Liang, R., ...
We report direct evidence of charge/orbital ordering of low energy electronic states of $Cu$ in YBa$_2$Cu$_3$O$_{6+x}$ ortho-II phase in both the $CuO_3$ chain and the CuO$_2$ plane. Huge enhancement...
He, R. H., Feng, D. L., Eisaki, H., Kishio, K., Gu, G. D.
A systematic analysis of the complex lineshape at $(\pi,0)$ of heavily overdoped Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ is presented. We show that a coherent component in the quasi-particle excitation is...
Effect of chemical inhomogeneity in the bismuth-based copper oxide superconductors (2003)
Eisaki, H., Kaneko, N., Feng, D. L., Damascelli, A., Mang, P. K., Shen, K. M., ...
We examine the effect on the superconducting transition temperature (Tc) of chemical inhomogeneities in Bi2201 and Bi2212 single crystals. Cation disorder at the Sr crystallographic site is inherent...
Fully Gapped Single-Particle Excitations in the Lightly Doped Cuprates (2003)
Shen, K. M., Yoshida, T., Lu, D. H., Ronning, F., Armitage, N. P., Lee, W. S., ...
The low-energy excitations of the lightly doped cuprates were studied by angle-resolved photoemission spectroscopy. A finite gap was measured over the entire Brillouin zone, including along the...
Kim, C., Mehta, A., Feng, D. L., Shen, K. M., Armitage, N. P., Char, K., ...
We report the first application of x-rays to the measurement of the temperature dependent Bragg peak intensities to obtain Debye-Waller factors on high-temperature superconductors. Intensities of...
Ronning, F., Sasagawa, T., Kohsaka, Y., Shen, K. M., Damascelli, A., Kim, C., ...
We present angle resolved photoemission (ARPES) data on Na-doped Ca$_2$CuO$_2$Cl$_2$. We demonstrate that the chemical potential shifts upon doping the system across the insulator to metal...
Armitage, N. P., Lu, D. H., Kim, C., Damascelli, A., Shen, K. M., Ronning, F., ...
Using methods made possible by recent advances in photoemission technology, we perform an indepth line-shape analysis of the angle-resolved photoemission spectra of the electron doped (n-type)...
Universality of the Electronic Structure from a Half Filled CuO_2 Plane (2002)
Ronning, F., Kim, C., Shen, K. M., Armitage, N. P., Damascelli, A., Lu, D. H., ...
We present angle resolved photoemission (ARPES) data from insulating A_2CuO_2X_2 (A=Sr, Ca; X=Cl, Br), Sr_2Cu_3O_4Cl_2, and Bi_2Sr_2MCu_2O_8 (M=Er, Dy) single crystals which illustrate that the low...
Doping dependence of an n-type cuprate superconductor investigated by ARPES (2002)
Armitage, N. P., Ronning, F., Lu, D. H., Kim, C., Damascelli, A., Shen, K. M., ...
We present an angle resolved photoemission (ARPES) doping dependence study of the n-type cuprate superconductor Nd_2-xCe_xCuO_4, from the half-filled Mott-insulator to the T_c=24K superconductor. In...
Electronic structure of MgB$_2$ from angle-resolved photoemission spectroscopy (2001)
Uchiyama, H., Shen, K. M., Lee, S., Damascelli, A., Lu, D. H., Feng, D. L., ...
The first angle-resolved photoemission spectroscopy results from MgB$_2$ single crystals are reported. Close to the $\Gamma$K and $\Gamma$M directions, three distinct dispersions are observed...
Feng, D. L., Damascelli, A., Shen, K. M., Motoyama, N., Lu, D. H., Eisaki, H., ...
The low-energy electronic structure of the trilayer cuprate superconductor Bi$_2$Sr$_2$Ca$_2$Cu$_3$O$_{10+\delta}$ near optimal doping is investigated by angle-resolved photoemission spectroscopy....
Anomalous electronic structure and pseudogap effects in Nd_1.85Ce_0.15CuO_4 (2001)
Armitage, N. P., Lu, D. H., Kim, C., Damascelli, A., Shen, K. M., Ronning, F., ...
We report a high-resolution angle-resolved photoemission spectroscopic (ARPES) study of the electron-doped (n-type) cuprate superconductor Nd_1.85Ce_0.15CuO_4. We observe regions along the Fermi...
Feng, D. L., Kim, C., Eisaki, H., Lu, D. H., Shen, K. M., Ronning, F., ...
Based on angle resolved photoemission spectra measured on different systems at different dopings, momenta and photon energies, we show that the anomalously large spectral linewidth in the $(\pi,0)$...
Surface electronic structure of Sr2RuO4 (2001)
Shen, K. M., Damascelli, A., Lu, D. H., Armitage, N. P., Ronning, F., Feng, D. L., ...
We have addressed the possibility of surface ferromagnetism in Sr2RuO4 by investigating its surface electronic states by angle-resolved photoemission spectroscopy (ARPES). By cleaving samples under...
Superconducting Gap and Strong In-Plane Anisotropy in Untwinned YBa2Cu3O7-d (2001)
Lu, D. H., Feng, D. L., Armitage, N. P., Shen, K. M., Damascelli, A., Kim, C., ...
With significantly improved sample quality and instrumental resolution, we clearly identify in the (pi,0) ARPES spectra from YBa2Cu3O6.993, in the superconducting state, the long-sought...
Bilayer Splitting in the Electronic Structure of Heavily Overdoped Bi2Sr2CaCu2O8+d (2001)
Feng, D. L., Armitage, N. P., Lu, D. H., Damascelli, A., Hu, J. P., Bogdanov, P., ...
The electronic structure of heavily overdoped Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ is investigated by angle-resolved photoemission spectroscopy. The long-sought bilayer band splitting in this two-plane...
Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors (2001)
Lanzara, A., Bogdanov, P. V., Zhou, X. J., Kellar, S. A., Feng, D. L., Lu, E. D., ...
Coupling between electrons and phonons (lattice vibrations) drives the formation of the electron pairs responsible for conventional superconductivity. The lack of direct evidence for electron-phonon...
Superconducting Gap Anisotropy in Nd1.85Ce0.15CuO4: Results from Photoemission (2001)
Armitage, N. P., Damascelli, A., Feng, D. L., Kim, C., Lu, D. H., Onose, Y., ...
Bilayer Splitting in the Electronic Structure of Heavily Overdoped Bi2Sr2CaCu2O8 + delta (2001)
Armitage, N. P., Damascelli, A., Feng, D. L., Hu, J. P., Lu, D. H.
Superconducting Gap and Strong In-Plane Anisotropy in Untwinned YBa2Cu3O7–delta (2001)
Armitage, N. P., Damascelli, A., Feng, D. L., Lu, D. H., Shen, K. M.
Fermi surface of Sr2RuO4 from angle resolved photoemission (2000)
Damascelli, A., Shen, K. M., Lu, D. H., Armitage, N. P., Ronning, F., Feng, D. L., ...
We investigated the low-energy electronic structure of Sr2RuO4 by angle-resolved photoemission spectroscopy (ARPES) focusing, in particular, on the controversial issues of the Fermi surface (FS)...
Superconducting Gap Anisotropy in Nd$_{1.85}$Ce$_{0.15}$CuO$_4$: Results from Photoemission (2000)
Armitage, N. P., Lu, D. H., Feng, D. L., Kim, C., Damascelli, A., Shen, K. M., ...
We have performed angle resolved photoelectron spectroscopy on the electron doped cuprate superconductor Nd$_{1.85}$Ce$_{0.15}$CuO$_4$. A comparison of the leading edge midpoints between the...
Feng, D. L., Lu, D. H., Shen, K. M., Kim, C., Eisaki, H., Damascelli, A., ...
We report that the doping and temperature dependence of photoemission spectra near the Brillouin zone boundary of Bi2Sr2CaCu2O8+delta exhibit unexpected sensitivity to the superfluid density. In the...
Fermi Surface, Surface States, and Surface Reconstruction in Sr2RuO4 (2000)
Damascelli, A., Lu, D. H., Shen, K. M., Armitage, N. P., Ronning, F., Feng, D. L., ...
The electronic structure of Sr2RuO4 is investigated by high angular resolution ARPES at several incident photon energies. We address the controversial issues of the Fermi surface (FS) topology and of...
ARPES study of Pb doped Bi_2Sr_2CaCu_2O_8 - a new Fermi surface picture (2000)
Bogdanov, P. V., Lanzara, A., Zhou, X. J., Kellar, S. A., Feng, D. L., Lu, E. D., ...
High resolution angle resolved photoemission data from Pb doped Bi_2Sr_2CaCu_2O_8 (Bi2212) with suppressed superstructure is presented. Improved resolution and very high momentum space sampling at...
Feng, D. L., Zheng, W. J., Shen, K. M., Lu, D. H., Ronning, F., ...
The Fermi surface of the Bi2212 system is systematically studied using a variety of photon energies. In addition to reconciling the conflicting reports on the Fermi surface of this important...
Ronning, F., Kim, C., Feng, D. L., Marshall, D. S., Loeser, A. G., Miller, L. L., ...
An angle resolved photoemission study on Ca2CuO2Cl2, a parent compound of high Tc superconductors is reported. Analysis of the electron occupation probability, n(k) from the spectra shows a steep...
White, P. J., Shen, Z. X., Feng, D. L., Kim, C., Hasan, M. Z., Harris, J. M., ...
An angle resolved photoelectron spectroscopy study was conducted on BiSrCaCuZnO. A small amount of Zn substitution for Cu almost completely suppresses the otherwise sharp spectral peak along the...
Zn Impurities in BiSrCa(CuZn)O II - Temperature Induced Spectral Change (1999)
White, P. J., Shen, Z. X., Feng, D. L., Kim, C., Hasan, M. Z., Loeser, A. G., ...
The contents of this paper were absorbed into cond-mat/9901349.
Feng, D. L., Murillo, J., Jadhav, P., McKenna, C., Gebara, O. C., Lipinska, I., ...
BACKGROUND: It is well accepted that heavy physical exertion can trigger the onset of myocardial infarction, but the mechanism is uncertain. As platelet and endothelial function play an important...