Itinerant spin excitations near the hidden order transition in URu2Si2 (2008)
Janik, J. A., Zhou, H. D., Balicas, L., MacDougall, G. J., Luke, G. M., ...
By means of neutron scattering we show that the high-temperature precursor to the hidden order state of the heavy fermion superconductor URu$_{2}$Si$_{2}$ exhibits heavily damped incommensurate...
Spin Waves in the Ferromagnetic Ground State of the Kagome Staircase System Co3V2O8 (2008)
Ramazanoglu, M., Adams, C. P., Clancy, J. P., Berlinsky, A. J., Yamani, Z., Szymczak, R., ...
Inelastic neutron scattering measurements were performed on single crystal Co3V2O8 wherein magnetic cobalt ions reside on distinct spine and cross-tie sites within kagome staircase planes. This...
Stock, C., Buyers, W. J. L., Yamani, Z., Tun, Z., Birgeneau, R. J., Liang, R., ...
Using neutron scattering we have determined the magnetic structure and fluctuations in the YBa2Cu3O6.35 superconductor (Tc=18 K). The long-range ordered collinear spins of the insulating...
Three Dimensional Magnetic Correlations in Multiferroic LuFe2O4 (2007)
Christianson, A. D., Lumsden, M. D., Angst, M., Yamani, Z., Tian, W., Jin, R., ...
We present single-crystal neutron diffraction measurements on multiferroic LuFe2O4 showing phase transitions at 240 and 175 K. Magnetic reflections are observed below each transition indicating that...
Wiebe, C. R., Janik, J. A., Macdougall, G. J., Luke, G. M., Garrett, J. D., Zhou, H. D., ...
One of the primary goals of modern condensed matter physics is to elucidate the nature of the ground state in various electronic systems. Many correlated electron materials, such as high temperature...
Haravifard, S., Rule, K. C., Dabkowska, H. A., Gaulin, B. D., Yamani, Z., Buyers, W. J. L.
Single crystals of the lightly-doped spin-Peierls system Cu(1-x)Cd(x)GeO3 have been studied using bulk susceptibility, x-ray diffraction, and inelastic neutron scattering techniques. We investigate...
Incommensurate Spin Ordering and Fluctuations in underdoped La_{2-x}Ba_{x}CuO_{4} (2007)
Dunsiger, S. R., Zhao, Y., Yamani, Z., Buyers, W. J. L., Dabkowska, H., Gaulin, B. D.
Using neutron scattering techniques, we have studied incommensurate spin ordering as well as low energy spin dynamics in single crystal underdoped \LBCO with x$\sim$0.095 and 0.08; high temperature...
Orbital and Spin Excitations in Cobalt Oxide (2007)
Yamani, Z., Buyers, W. J. L., Cowley, R. A., Prabhakaran, D.
By means of neutron scattering we have determined new branches of magnetic excitations in orbitally active CoO (TN=290 K) up to 15 THz and for temperatures from 6 K to 450 K. Data were taken in the...
Antiferromagnetic correlations near the lower edge of superconducting dome in YBCO6+x (2007)
Yamani, Z., Buyers, W. J. L., Wang, F., Liang, R., Bonn, D., ...
Neutron scattering from high-quality YBCO6.334 single crystals with a T$_c$ of 8.4 K shows that there is no coexistence with long-range antiferromagnetic order at this very low, near-critical doping...
Buyers, W. J. L., Stock, C., Yamani, Z., Birgeneau, R. J., Liang, R., Bonn, D., ...
Magnetic spins and charges interact strongly in high-temperature superconductors. New physics emerges as layers of copper oxide are tuned towards the boundary of the superconducting phase. As the...
Yamani, Z., Statt, B. W., MacFarlane, W. A., Liang, Ruixing, Bonn, D. A., Hardy, W. N.
Nuclear magnetic resonance (NMR) measurements of CuO chains of detwinned Ortho-II YBa$_2$Cu$_3$O$_{6.5}$ (YBCO6.5) single crystals reveal unusual and remarkable properties. The chain Cu resonance...
Stock, C., Buyers, W. J. L., Yamani, Z., Broholm, C., Tun, Z., ...
We have mapped the neutron scattering spin spectrum at low-energies in YBa2Cu3O6.353 (Tc=18 K) where the doping ~0.06 is near the critical value (pc=0.055) for superconductivity. No coexistence with...
Cu NMR Study of Detwinned Single Crystals of Ortho--II YBCO6.5 (2003)
Yamani, Z., MacFarlane, W. A., Statt, B. W., Bonn, D., Liang, R., Hardy, W. N.
Copper NMR has been used as a local probe of the oxygen ordering in Ortho--II YBa2Cu3O6.5 crystals grown in BaZrO3 crucibles. Line assignments have been made to each of the expected...
Hidden orbital currents and spin gap in the heavy fermion superconductor URu$_2$Si$_2$ (2003)
Wiebe, C. R., Luke, G. M., Yamani, Z., Menovsky, A. A., Buyers, W. J. L.
We have performed neutron scattering experiments on the heavy fermion superconductor URu$_2$Si$_2$ to search for the orbital currents predicted to exist in the ordered phase below {\Tn} = 17.5 K....