Magnetic resonance in the model high-temperature superconductor HgBa$_2$CuO$_{4+\delta}$ (2008)
Yu, G., Li, Y., Motoyama, E. M., Zhao, X., Barisic, N., Cho, Y., ...
We present an inelastic neutron scattering study of the structurally simple single-layer compound HgBa$_2$CuO$_{4+\delta}$ close to optimal doping ($T_c \approx 96$ K). A well-defined...
Schmitt, F., Lee, W. S., Meevasana, W., Motoyama, E., Greven, M., ...
Samples of Nd(2-x)Ce(x)CuO(4), an electron-doped high temperature superconducting cuprate (HTSC), near optimal doping at x = 0.155 were measured via angle resolved photoemission (ARPES). We report a...
High-energy anomaly dichotomy in electron- and hole-doped high temperature superconductors (2008)
Moritz, B., Schmitt, F., Meevasana, W., Johnston, S., Motoyama, E. M., Greven, M., ...
New results are presented from angle-resolved photoemission spectroscopy on the electron-doped cuprate Nd_1.83Ce_0.17CuO_4 that show a high energy anomaly in the dispersion around 500-600 meV,...
Van Heumen, E., Muhlethaler, E., Kuzmenko, A. B., Eisaki, H., Greven, M., ...
We take advantage of the connection between the free carrier optical conductivity and the glue function in the normal state, to reconstruct from the infrared optical conductivity the glue-spectrum of...
Quasi-zero Dimensional CuB2O4: A case study for resonant inelastic X-ray scattering (2008)
Hancock, J. N., Chabot-Couture, G., Li, Y., Petrakovskii, G., Ishii, K., Jarrige, I., ...
We explore the general phenomenology of resonant inelastic scattering (RIXS) using CuB2O4, a network of CuO4 plaquettes electronically isolated by B+3 ions. Spectra show a small number of...
Yu, G., Li, Y., Motoyama, E. M., Hradil, K., Mole, R. A., Greven, M.
Inelastic neutron scattering for Nd$_{2-x}$Ce$_x$CuO$_{4+\delta}$ near optimal doping reveals a change of the dynamic magnetic susceptibility at the antiferromagnetic zone center from the normal to...
Optical and thermodynamic properties of the high-temperature superconductor HgBa_2CuO_4+delta (2006)
Van Heumen, E., Lortz, R., Kuzmenko, A. B., Carbone, F., Zhao, X., ...
In- and out-of-plane optical spectra and specific heat measurements for the single layer cuprate superconductor Hg-1201 at optimal doping (Tc = 97 K) are presented. Both the in-plane and out-of-plane...
Motoyama, E. M., Yu, G., Vishik, I. M., Vajk, O. P., Mang, P. K., Greven, M.
High-transition-temperature (high-Tc) superconductivity develops near antiferromagnetic phases, and it is possible that magnetic excitations contribute to the superconducting pairing mechanism. To...
Incident-energy and polarization dependent RIXS study of La2CuO4 (2006)
Lu, L., Hancock, J. N., Chabot-Couture, G., Vajk, O. P., Yu, G., Ishii, K., ...
We present a detailed Cu K-edge resonant inelastic X-ray scattering (RIXS) study of the Mott insulator La2CuO4 in the 1-7 eV energy transfer range. As initially found for the high-temperature...
Study of HgBa$_2$CuO$_{4+\delta}$ by Angle-Resolved Photoemission Spectroscopy (2006)
Lee, W. S., Yoshida, T., Meevasana, W., Shen, K. M., Lu, D. H., Yang, W. L., ...
We present the first angle-resolved photoemission measurement on the single-layer Hg-based cuprate, HgBa$_2$CuO$_{4+\delta}$ (Hg1201). A quasi-particle peak in the spectrum and a kink in the band...
Ye, F., Zhou, L., Meyer, S. A., Shelton, L. J., Belanger, D. P., Lu, L., ...
The critical exponent beta =0.17(1) for the three-dimensional random-field Ising model (RFIM) order parameter upon zero-field cooling (ZFC) has been determined using extinction-free magnetic x-ray...
Zhao, X., Yu, G., Cho, Y., Chabot-Couture, G., Barisic, N., Bourges, P., ...
This paper is published in Advanced Materials (available at http://www3.interscience.wiley.com/cgi-bin/abstract/113511105/ABSTRACT). It has been withdrawn from the cond-mat preprint archive in order...
Magnetic field effect on the superconducting magnetic gap of Nd{1.85}Ce{0.15}CuO4 (2006)
Motoyama, E. M., Mang, P. K., Petitgrand, D., Yu, G., Vajk, O. P., Vishik, I. M., ...
Inelastic neutron scattering measurements on the archetypical electron-doped material Nd{1.85}Ce{0.15}CuO4 up to high relative magnetic field strength, H/Hc2 ~ 50%, reveal a simple linear...
Inhomogeneity Induces Resonance Coherence Peaks in Superconducting BSCCO (2005)
Fang, A. C., Capriotti, L., Scalapino, D. J., Kivelson, S. A., Kaneko, N., Greven, M., ...
In this paper we analyze, using scanning tunneling spectroscopy, the density of electronic states in nearly optimally doped BSCCO in zero field. Focusing on the superconducting gap, we find patches...
Charge-Transfer Excitations in the Model Superconductor HgBa$_2$CuO$_{\bf 4+\delta}$ (2005)
Lu, L., Zhao, X., Chabot-Couture, G., Hancock, J. N., Kaneko, N., Vajk, O. P., ...
We report a Cu $K$-edge resonant inelastic x-ray scattering (RIXS) study of charge-transfer excitations in the 2-8 eV range in the structurally simple compound HgBa$_2$CuO$_{4+\delta}$ at optimal...
Lanzara, A., Bogdanov, P. V., Zhou, X. J., Kaneko, N., Eisaki, H., Greven, M., ...
A detailed study of the normal state photoemission lineshapes and quasiparticle dispersion for the single layer Bi$_2$Sr$_{2-x}$La$_x$CuO$_{6+\delta}$ (Bi2201) superconductor is presented. We report...
Savici, A. T., Fukaya, A., Gat-Malureanu, I. M., Ito, T., Russo, P. L., Uemura, Y. J., ...
Muon spin relaxation ($\mu$SR) measurements in high transverse magnetic fields ($\parallel \hat c$) revealed strong field-induced quasi-static magnetism in the underdoped and Eu doped...
STM Studies of Near-Optimal Doped Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ (2004)
Kapitulnik, A., Fang, A., Howald, C., Greven, M.
In this paper we summarize our STM studies of the density of electronic states in nearly optimally doped Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ in zero field. We report on the inhomogeneity of the gap...
Structural and magnetic properties of the single-layer manganese oxide La{1-x}Sr{1+x}MnO4 (2004)
Larochelle, S., Mehta, A., Lu, L., Mang, P. K., Vajk, O. P., Kaneko, N., ...
Using x-ray and neutron scattering, we have studied the structural and magnetic properties of the single-layer manganite La{1-x}Sr{1+x}MnO4 (0 < x < 0.7). Single crystals were grown by the...
Periodic Coherence Peak Height Modulations in Superconducting BSCCO (2004)
Fang, A., Howald, C., Kaneko, N., Greven, M., Kapitulnik, A.
In this paper we analyze, using scanning tunneling spectroscopy (STS), the local density of electronic states (LDOS) in nearly optimally doped BSCCO in zero field. We see both dispersive and...
Universal scaling relation in high-temperature superconductors (2004)
Homes, C. C., Dordevic, S. V., Strongin, M., Bonn, D. A., Liang, Ruixing, Hardy, W. N., ...
Scaling laws express a systematic and universal simplicity among complex systems in nature. For example, such laws are of enormous significance in biology. Scaling relations are also important in the...
Phase Decomposition and Chemical Inhomogeneity in Nd2-xCexCuO4 (2004)
Mang, P. K., Larochelle, S., Mehta, A., Vajk, O. P., Erickson, A. S., Lu, L., ...
Extensive X-ray and neutron scattering experiments and additional transmission electron microscopy results reveal the partial decomposition of Nd2-xCexCuO4 (NCCO) in a low-oxygen-fugacity environment...
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...
Susceptibilities and Spin Gaps of Weakly-coupled Spin Ladders (2003)
We calculate the uniform and staggered susceptibilities of two-chain spin-1/2 Heisenberg ladders using Monte-Carlo simulations. We show that the gap extracted from the uniform susceptibility and 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...
Spurious magnetism in high-Tc superconductor (2003)
Mang, P. K., Larochelle, S., Greven, M.
One challenge in condensed-matter physics is to unravel the interplay between magnetism and superconductivity in copper oxides with a high critical temperature (Tc). Kang et al. claim to have...
Spin Correlations and Magnetic Order in Nonsuperconducting Nd_{2-x}Ce_xCuO_{4\pm\delta} (2003)
Mang, P. K., Vajk, O. P., Arvanitaki, A., Lynn, J. W., Greven, M.
We report quantitative neutron scattering measurements of the evolution with doping of the N\'eel temperature, the antiferromagnetic correlations, and the ordered moment of as-grown,...
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., ...
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)...
Vajk, O. P., Greven, M., Mang, P. K., Lynn, J. W.
We have successfully grown sizable single crystals of La_2Cu_{1-z}(Zn,Mg)_zO_4 with up to nearly half of the magnetic Cu sites replaced by non-magnetic Zn and Mg. Neutron scattering, SQUID...
Electron-phonon interaction in n-doped cuprates: an Inelastic X-ray Scattering study (2002)
D'Astuto, M., Mang, P. K., Giura, P., Shukla, A., Mirone, A., Krisch, M., ...
Inelastic x-ray scattering (IXS) with very high (meV) energy resolution has become a valuable spectroscopic tool, complementing the well established coherent inelastic neutron scattering (INS)...
Periodic Density of States Modulations in Superconducting $\rm Bi_2Sr_2CaCu_2O_{8+\delta}$ (2002)
Howald, C., Eisaki, H., Kaneko, N., Greven, M., Kapitulnik, A.
In this paper we show, using scanning tunneling spectroscopy (STS), the existence of static striped density of electronic states in nearly optimally doped $\rm Bi_2Sr_2CaCu_2O_{8+\delta}$ in zero...
Sasagawa, T., Mang, P. K., Vajk, O. P., Kapitulnik, A., Greven, M.
Although La(2)Cu(1-x)Li(x)O(4) [Li-LCO] differs from La(2-x)Sr(x)CuO(4) [Sr-LCO] in many ways (e.g., the absence of metallic transport, high-Tc superconductivity, and incommensurate antiferromagnetic...
Quantum vs. Geometric Disorder in a Two-Dimensional Heisenberg Antiferromagnet (2002)
We present a numerical study of the spin-1/2 bilayer Heisenberg antiferromagnet with random interlayer dimer dilution. From the temperature dependence of the uniform susceptibility and a scaling...
Quantum Impurities in the Two-Dimensional Spin One-Half Heisenberg Antiferromagnet (2002)
Vajk, O. P., Mang, P. K., Greven, M., Gehring, P. M., Lynn, J. W.
The study of randomness in low-dimensional quantum antiferromagnets is at the forefront of research in the field of strongly correlated electron systems, yet there have been relatively few...
Order Parameter Criticality of the d=3 Random-Field Ising Antiferromagnet Fe(0.85)Zn(0.15)F2 (2002)
Ye, F., Zhou, L., Larochelle, S., Lu, L., Belanger, D. P., Greven, M., ...
The critical exponent beta =0.16 +- 0.02 for the random-field Ising model order parameter is determined using extinction-free magnetic x-ray scattering for Fe(0.85)Zn(0.15)F2 in magnetic fields of 10...
D'Astuto, M., Mang, P. K., Giura, P., Shukla, A., Ghigna, P., Mirone, A., ...
The phonon dispersions of $\mathrm{Nd_{1.86}Ce_{0.14}CuO_{4+\delta}}$ along the $[\xi,0,0]$ direction have been determined by inelastic x-ray scattering. Compared to the undoped parent compound, the...
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...
Liang, Ruixing, Bonn, D. A., Hardy, W. N., Wynn, Janice C., Moler, K. A., Lu, L., ...
High-purity and homogeneous YBa2Cu3Oy single crystals with carrier doping level near the AFM-SC boundary have been obtained in the oxygen content range between y = 6.340 and 6.370. The crystals are...
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 $(\pi,0)$...
Nature of $e_g$ Electron Order in La$_{1-x}$Sr$_{1+x}$MnO$_4$ (2001)
Larochelle, S., Mehta, A., Kaneko, N., Mang, P. K., Panchula, A. F., Zhou, L., ...
Synchrotron x-ray scattering measurements of the low-temperature structure of the single-layer manganese oxide La$_{1-x}$Sr$_{1+x}$MnO$_4$, over the doping range $0.33 \le x \le 0.67$, indicate the...
Neutron Scattering study of Sr_2Cu_3O_4Cl_2 (2000)
Kim, Y. J., Birgeneau, R. J., Chou, F. C., Greven, M., Kastner, M. A., Lee, Y. S., ...
We report a neutron scattering study on the tetragonal compound Sr_2Cu_3O_4Cl_2, which has two-dimensional (2D) interpenetrating Cu_I and Cu_{II} subsystems, each forming a S=1/2 square lattice...
Energy Spectrum of Spin Fluctuations in Superconducting La2-xSrxCuO4 (0.10 < x < 0.25) (1999)
Lee, Chul-Ho, Yamada, Kazuyoshi, Endoh, Yasuo, Shirane, Gen, Birgeneau, R. J., Kastner, M. A., ...
The energy spectrum of incommensurate spin fluctuations in superconducting Sr-doped La2CuO4 has been studied by inelastic neutron scattering experiments. An energy gap in the spin excitation spectrum...
Freezing of anisotropic spin clusters in La1.98Sr0.02CuO4 (1999)
Matsuda, M., Lee, Y. S., Greven, M., Kastner, M. A., Birgeneau, R. J., Yamada, K., ...
A spin-glass compound, La$_{1.98}$Sr$_{0.02}$CuO$_4$, shows quasi-three-dimensional magnetic ordering below $\sim$40 K. A remarkable feature is that the magnetic correlation length along the...
Instantaneous Spin Correlations in La2CuO4 (1999)
Birgeneau, R. J., Greven, M., Kastner, M. A., Lee, Y. S., Wells, B. O., Endoh, Y., ...
We have carried out a neutron scattering study of the instantaneous spin-spin correlations in La2CuO4 (T_N = 325 K) over the temperature range 337 K to 824 K. Incident neutron energies varying from...
Spin Correlations in the Two-Dimensional Spin-5/2 Heisenberg Antiferromagnet Rb2MnF4 (1998)
Lee, Y. S., Greven, M., Wells, B. O., Birgeneau, R. J., Shirane, G.
We report a neutron scattering study of the instantaneous spin correlations in the two-dimensional spin S=5/2 square-lattice Heisenberg antiferromagnet Rb_2MnF_4. The measured correlation lengths are...
Correlations and N\'eel Order of Randomly Diluted Quantum Spin Ladders (1998)
We present a Monte Carlo study of the correlation length $\xi$ of randomly diluted antiferromagnetic Heisenberg ladders, composed of two spin--1/2 chains. For weak and intermediate inter--chain...
Monte Carlo Study of Correlations in Quantum Spin Chains at Non-Zero Temperature (1997)
Kim, Y. J., Greven, M., Birgeneau, R. J.
Antiferromagnetic Heisenberg spin chains with various spin values ($S=1/2,1,3/2,2,5/2$) are studied numerically with the quantum Monte Carlo method. Effective spin $S$ chains are realized by...
The Square-Lattice Heisenberg Antiferromagnet at Very Large Correlation Lengths (1997)
Beard, B. B., Birgeneau, R. J., Greven, M.
The correlation length of the square-lattice spin-1/2 Heisenberg antiferromagnet is studied in the low-temperature (asymptotic-scaling) regime. Our novel approach combines a very efficient loop...
A Monte Carlo Study of Correlations in Quantum Spin Ladders (1996)
We study antiferromagnetic spin--1/2 Heisenberg ladders, comprised of $n_c$ chains ($2 \leq n_c \leq 6$) with ratio $J_{\bot}/J_{\|}$ of inter-- to intra--chain couplings. From measurements of the...
Spin Dependence of Correlations in Two-Dimensional Quantum Heisenberg Antiferromagnets (1995)
Elstner, N., Sokol, A., Singh, R. R. P., Greven, M., Birgeneau, R. J.
We present a series expansion study of spin-S square-lattice Heisenberg antiferromagnets. The numerical data are in excellent agreement with recent neutron scattering measurements. Our key result is...