Cleaving-temperature dependence of layered-oxide surfaces (2008)
Pennec, Y., Ingle, N. J. C., Elfimov, I. S, Varene, E., Damascelli, A., Barth, J. V., ...
The surfaces generated by cleaving non-polar, two-dimensional oxides are often considered to be perfect or ideal. However, single particle spectroscopies on Sr2RuO4, an archetypal non-polar two...
Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4 (2008)
Haverkort, M. W., Elfimov, I. S., Tjeng, L. H., Sawatzky, G. A., Damascelli, A.
We present a first-principle study of spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4. For nearly degenerate bands, spin-orbit coupling leads to a dramatic change of the Fermi...
Hossain, M. A., Mottershead, J. D. F., Bostwick, A., McChesney, J. L., Rotenberg, E., Liang, R., ...
The discovery of quantum oscillations in the normal-state electrical resistivity of YBa2Cu3O6.5 provides the first evidence for the existence of Fermi surface (FS) pockets in an underdoped cuprate....
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...
Fermi pockets and correlation effects in underdoped YBa2Cu3O6.5 (2007)
Elfimov, I. S., Sawatzky, G. A., Damascelli, A.
The detection of quantum oscillations in the electrical resistivity of YBa2Cu3O6.5 provides direct evidence for the existence of Fermi surface pockets in an underdoped cuprate. We present a...
Two Gaps Make a High Temperature Superconductor? (2007)
Huefner, S., Hossain, M. A., Damascelli, A., Sawatzky, G. A.
One of the keys to the high-temperature superconductivity puzzle is the identification of the energy scales associated with the emergence of a coherent condensate of superconducting electron pairs....
Peets, D. C., Mottershead, J. D. F., Wu, B., Elfimov, I. S., Liang, R., Hardy, W. N., ...
Single-particle spectroscopic probes, such as scanning tunneling and angle-resolved photoemission spectroscopy (ARPES), have provided us with crucial insights into the complex electronic structure of...
Anomalous high energy dispersion in photoemission spectra from insulating cuprates (2006)
Ronning, F., Shen, K. M., Armitage, N. P., Damascelli, A., Lu, D. H., ...
Angle resolved photoelectron spectroscopic measurements have been performed on an insulating cuprate Ca_2CuO_2Cl_2. High resolution data taken along the \Gamma to (pi,pi) cut show an additional...
Suppressed reflectivity due to spin-controlled localization in a magnetic semiconductor (2005)
Mena, F. P., DiTusa, J. F., Aeppli, G., Young, D. P., Damascelli, A., ...
The narrow gap semiconductor FeSi owes its strong paramagnetism to electron-correlation effects. Partial Co substitution for Fe produces a spin-polarized doped semiconductor. The spin-polarization...
Ingle, N. J. C., Shen, K. M., Baumberger, F., Meevasana, W., Lu, D. H., Shen, Z. X., ...
ARPES spectra hold a wealth of information about the many-body interactions in a correlated material. However, the quantitative analysis of ARPES spectra to extract the various coupling parameters in...
Fermi Surface and Quasiparticle Excitations of overdoped Tl2Ba2CuO6+d by ARPES (2005)
Plate, M., Mottershead, J. D. F., Elfimov, I. S., Peets, D. C., Liang, Ruixing, Bonn, D. A., ...
The electronic structure of the high-T_c superconductor Tl2Ba2CuO6+d is studied by ARPES. For a very overdoped Tc=30K sample, the Fermi surface consists of a single large hole pocket centered at...
Ferromagnetism makes a doped semiconductor less shiny (2004)
Mena, F. P., DiTusa, J. F., Aeppli, G., Young, D. P, Presura, C., ...
Magnetic semiconductors have attracted interest because of the question of how a magnetic metal can be derived from a paramagnetic insulator. Here our approach is to carrier dope insulating FeSi and...
Shen, K. M., Ronning, F., Lu, D. H., Lee, W. S., Ingle, N. J. C., Meevasana, W., ...
The evolution of Ca$_{2-x}$Na$_{x}$CuO$_{2}$Cl$_{2}$ from Mott insulator to superconductor was studied using angle-resolved photoemission spectroscopy. By measuring both the excitations near the...
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...
Powerlaw optical conductivity with a constant phase angle in high Tc superconductors (2003)
Molegraaf, H. J. A., Zaanen, J., Nussinov, Z., Carbone, F., Damascelli, A., ...
In certain materials with strong electron correlations a quantum phase transition (QPT) at zero temperature can occur, in the proximity of which a quantum critical state of matter has been...
Heavy carriers and non-Drude optical conductivity in MnSi (2003)
Mena,F. P., Damascelli,A., Fäth,M., Menovsky,A. A., Mydosh,J. A.
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...
Quantum critical behaviour in a high-T-c superconductor (2003)
Marel, D. Van Der, Molegraaf, H.J.A., Zaanen, J., Nussinov, Z., Carbone, F., Damascelli, A., ...
Heavy carriers and non-Drude optical conductivity in MnSi (2003)
Mena, F. P., Damascelli, A., Fäth, M., Menovsky, A. A., Mydosh, J. A.
Quantum critical behaviour in a high-T-c superconductor (2003)
Marel, D. Van Der, Molegraaf, H.J.A., Zaanen, J., Nussinov, Z., Carbone, F., Damascelli, A., ...
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...
The symmetry problem in -NaV (2001)
A. Damascelli, J. Jegoudez, G. Dhalenne, A. Revcolevschi
We discuss the symmetry of ##-NaV in the high temperature phase on the basis of optical conductivity data. Conclusive information cannot be obtained by studying the optically allowed lattice...
Systematics of C-Axis Phonons in the Thallium- and Bismuth-Based Cuprate Superconductors (2001)
A. A. Tsvetkov, D. Dulic, A. Damascelli, G. A. Kaljushnaia, J. I. Gorina, ...
this paper we present a systematic study of the c-axis IR phonons in Bi and Tl cuprates by means of grazing angle reflectivity measurements. We discuss the technique used and show its sensitivity to...
Systematics of C-Axis Phonons in the Thallium- and Bismuth-Based Cuprate Superconductors (2001)
A. A. Tsvetkov, D. Dulic, A. Damascelli, G. A. Kaljushnaia, J. I. Gorina, ...
this paper we present a systematic study of the c-axis IR phonons in Bi and Tl cuprates by means of grazing angle reflectivity measurements. We discuss the technique used and show its sensitivity to...
Charged magnons and magneto-elastic polarons in the mid-infrared spectrum of YBa2Cu3O6 (2001)
M. Gruninger, A. Damascelli, A. Zibold, H. P. Geserich, A. Erb, ...
The optical conductivity of undoped and low-doped YBa Cu O is studied in detail in the mid-infrared range. Full 236 16 18 Z. Z. isotope substitution of O with O is used to a study the optical phonons...
A. Damascelli, J. Jegoudez, G. Dhalenne, A. Revcolevschi
We discuss the symmetry of ##-NaV in the high temperature phase on the basis of optical conductivity data. Conclusive information cannot be obtained by studying the optically allowed lattice...
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 $(\pi,0)$...
We review our angle-resolved photoemission spectroscopy (ARPES) results on different layered oxide superconductors, and on their insulating parent compounds. The low energy excitations are discussed...
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...
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...
n(k) Structure and Matrix Elements in Photoemission: Results from Insulating Ca_2CuO_2Cl_2 (2000)
Ronning, F., Kim, C., Shen, K. M., Armitage, N. P., Damascelli, A., Lu, D. H., ...
The photon energy dependence of angle-resolved photoemission data on Ca_2CuO_2Cl_2 is presented, and the role of the matrix element is investigated. It is shown that despite strong variations in the...
Optical spectroscopy of pure and doped $CuGeO_{3}$ (2000)
Dhalenne, G., Marel, D. Van Der, Damascelli, A., Revcolevschi, A.
Published in: Phys. Rev. B 61 (2000) 12063 Citing articles (CrossRef) citations recorded in [Science Citation Index] Abstract: We investigated in detail the optical properties of several...
Optical spectroscopic study of the interplay of spin and charge in $alpha NaV_{2}O_{5}$ (2000)
Jegoudez, J., Marel, D. Van Der, Presura, C., Damascelli, A, Revcolevschi, A.
Published in: Phys. Rev. B 61 (2000) 2535 Citing articles (CrossRef) citations recorded in [Science Citation Index] Abstract: We investigate the temperature dependent optical properties of NaV2O5, in...
Optical spectroscopy of pure and doped $CuGeO_{3}$ (2000)
Dhalenne, G., Marel, D. Van Der, Damascelli, A., Revcolevschi, A.
Published in: Phys. Rev. B 61 (2000) 12063 Citing articles (CrossRef) citations recorded in [Science Citation Index] Abstract: We investigated in detail the optical properties of several...
Low temperature ellipsometry of NaV2O5 (1999)
Presura, C., Damascelli, A., Kremer, R. K.
The dielectric function of alpha'NaV2O5 was measured with electric field along the a and b axes in the photon energy range 0.8-4.5 eV for temperatures down to 4K. We observe a pronounced decrease of...
Systematics of c-axis Phonons in the Thallium and Bismuth Based Cuprate Superconductors (1999)
Tsvetkov, A. A., Dulic, D., Damascelli, A., Kaljushnaia, G. A., Gorina, J. I., ...
We present grazing incidence reflectivity measurements in the far infrared region at temperatures above and below Tc for a series of thallium (Tl2Ba2CuO6, Tl2Ba2CaCu2O8) and bismuth (Bi2Sr2CuO6,...
Optical spectroscopy of pure and doped CuGeO3 (1999)
Damascelli, A., Dhalenne, G., Revcolevschi, A.
We investigated in detail the optical properties of several Cu(1-delta)Mg(delta)GeO3 (with delta=0,0.01), and CuGe(1-x)B(x)O3 with B=Si (x=0,0.007,0.05,0.1), and Al (x=0,0.01) single crystals, in the...
Optical spectroscopic study of the interplay of spin and charge in NaV2O5 (1999)
Damascelli, A., Presura, C., Jegoudez, J., Revcolevschi, A.
We investigate the temperature dependent optical properties of NaV2O5, in the energy range 4meV-4eV. The symmetry of the system is discussed on the basis of infrared phonon spectra. By analyzing the...
Mid-infrared absorption in YBa2Cu3O6: Failure of spin-wave theory in undoped cuprates? (1999)
Grueninger, M., Damascelli, A., Erb, A., Wolf, Th., Nunner, T., ...
The optical conductivity sigma (omega) of undoped YBa2Cu3O6 is studied in detail in the mid-infrared range. Substitutions on all but the Ba site are used to identify the prominent absorption...
Systematics of c-axis phonons in the thallium- and bismuth-based cuprate superconductors (1999)
Tsvetkov, A.A., Dulić, D., Marel, D. Van Der, Damascelli, A., Kaljushnaia, G.A., Gorina, J.I., ...
We present grazing incidence reflectivity measurements in the far-infrared region at temperatures above and below Tc for a series of thallium- (Tl2Ba2CuO6, Tl2Ba2CaCu2O8) and bismuth- (Bi2Sr2CuO6,...
Global and Local Measures of the Intrinsic Josephson Coupling in Tl2Ba2CuO6 (1998)
Tsvetkov, A. A., Moler, K. A., Kirtley, J. R., De Boer, J. L., Meetsma, A., ...
The Intlerlayer Josephson coupling between the planes of Tl2Ba2CuO6 was determined using infrared spectroscopy and magnetic flux vortex imaging. These methods give a consistent value of $\omega_J$=...
The symmetry problem in $NaV_{2}O_{5}$ (1998)
Dhalenne, G., Jegoudez, J., Marel, D. Van Der, Damascelli, A., Revcolevschi, A.
Published in: Physica B 259-261 (1999) 978-980 citations recorded in [Science Citation Index] Abstract: We discuss the symmetry of NaV2O5 in the high temperature phase on the basis of optical...
The symmetry problem in NaV2O5 (1998)
Damascelli, A., Jegoudez, J., Dhalenne, G., Revcolevschi, A.
We discuss the symmetry of NaV2O5 in the high temperature phase on the basis of optical conductivity data. Conclusive information cannot be obtained by studying the optically allowed lattice...
Inversion symmetry in the spin-Peierls compound NaV2O5 (1998)
Meetsma, A., De Boer, J. L., Damascelli, A., Jegoudez, J., Revcolevschi, A., Palstra, T. T. M.
At room-temperature NaV2O5 was found to have the centrosymmetric space group Pmmn. This space group implies the presence of only one kind of V site in contrast with previous reports of the...
Charged Magnons in $alpha'- NaV_{2}O_{5}$ (1998)
Jegoudez, J., Palstra, T. T. M., Presura, C., Grüninger, M., Marel, D. Van Der, Damascelli, A.
Published in: Phys. Rev. Lett. 81 (1998) 918 Citing articles (CrossRef) citations recorded in [Science Citation Index] Abstract: We investigated the temperature-dependent optical conductivity of...
Charged Magnons in NaV2O5 (1998)
Damascelli, A., Grueninger, M., Presura, C., Palstra, T. T. M., Jegoudez, J., ...
We investigated the temperature-dependent optical conductivity of NaV2O5 in the energy range 4 meV-4 eV. The intensities and the polarization dependence of the detected electronic excitations give a...
Inversion symmetry in the spin-Peierls compound $alpha' - NaV_{2}O_{5}$ (1998)
Revcolevschi, A., Jegoudez, J.;, Damascelli, A., Boer, J. L. De, Meetsma, A., Palstra, T. T. M.
Published in: Acta Crystallogr., C 54 (1998) , pp.1558 citations recorded in [Science Citation Index] Abstract: At room-temperature NaV2O5 was found to have the centrosymmetric space group Pmmn. This...
Inversion Symmetry in the Spin-Peierls Compound α'-NaV2O5 (1998)
Meetsma, Auke, Boer, Jan L. De, Damascelli, A., Jegoudez, J., Revcolevschi, A., Palstra, T.T.M.
At room temperature, sodium pentaoxodivanadate, NaV2O5, was found to have the centrosymmetric space group Pmmm. This space group implies the presence of only one kind of V site, in contrast with...
Direct Two-Magnon Optical Absorption in α'-NaV2O5: “Charged” Magnons (1998)
Damascelli, A., Marel, D. Van Der, Grüninger, M., Presura, C., Palstra, T.T.M., Jegoudez, J., ...
We investigate the temperature-dependent optical conductivity of α'-NaV2O5 in the energy range 4 meV–4 eV. The intensities and the polarization dependence of the detected electronic excitations...
Spin, charge, and bonding in transition metal mono-silicides (1998)
Menovsky, A.A., Marel, D. Van Der, Damascelli, A., Schulte, K.
Infrared signatures of the spin-Peierls transition in $CuGeO_3$ (1997)
Dhalenne, G., Parmigiani, F., Marel, D. Van Der, Damascelli, A., Revcolevschi, A.
Published in: Phys. Rev. B 56 (1997) 11373-11376 Citing articles (CrossRef) citations recorded in [Science Citation Index] Abstr