Raman study of Twin Free YBa$_2$Cu$_3$O$_{6.5}$ (Ortho-II) Single Crystals (2008)
Iliev, M. N., Hadjiev, V. G., Jandl, S., Boeuf, D. Le, Popov, V. N., Bonn, D., ...
The polarized Raman scattering spectra from freshly cleaved $ab$, $ac$, and $bc$ surfaces of high quality twin free YBa$_2$Cu$_3$O$_{6.5}$ (Ortho-II) single crystals ($T_c$=57.5 K and $\Delta T =...
Stock, C., Buyers, W. J. L., Yamani, Z., Tun, Z., Birgeneau, R. J., Liang, R., ...
Using neutron scattering we have determined the magnetic structure and fluctuations in the YBa2Cu3O6.35 superconductor (Tc=18 K). The long-range ordered collinear spins of the insulating...
Hossain, M. A., Mottershead, J. D. F., Bostwick, A., McChesney, J. L., Rotenberg, E., Liang, R., ...
The discovery of quantum oscillations in the normal-state electrical resistivity of YBa2Cu3O6.5 provides the first evidence for the existence of Fermi surface (FS) pockets in an underdoped cuprate....
Sonier, J. E., Ilton, M., Pacradouni, V., Kaiser, C. V., Sabok-Sayr, S. A., Ando, Y., ...
We report that in YBa2Cu3Oy and La2-xSrxCuO4 there is a spatially inhomogeneous response to magnetic field for temperatures T extending well above the bulk superconducting transition temperature Tc....
de Haas-van Alphen oscillations in the underdoped cuprate YBa$_2$Cu$_3$O$_{6.5}$ (2007)
Jaudet, C., Vignolles, D., Audouard, A., Levallois, J., LeBoeuf, D., Doiron-Leyraud, N., ...
The de Haas-van Alphen effect was observed in the underdoped cuprate YBa$_2$Cu$_3$O$_{6.5}$ via a torque technique in pulsed magnetic fields up to 59 T. Above an irreversibility field of $\sim$30 T,...
Xia, Jing, Schemm, Elizabeth, Deutscher, G., Kivelson, S. A., Bonn, D. A., Hardy, W. N., ...
Polar Kerr effect in the high-Tc superconductor \YBCO was measured at zero magnetic field with high precision using a cyogenic Sagnac fiber interferometer. We observed non-zero Kerr rotations of...
Sonier, J. E., Callaghan, F. D., Ando, Y., Kiefl, R. F., Brewer, J. H., Kaiser, C. V., ...
Highly disordered magnetism confined to individual weakly interacting vortices is detected by muon spin rotation in two different families of high-transition-temperature superconductors, but only in...
Sonier, J. E., Sabok-Sayr, S. A., Callaghan, F. D., Kaiser, C. V., Pacradouni, V., Brewer, J. H., ...
We report on muon spin rotation measurements of the internal magnetic field distribution n(B) in the vortex solid phase of YBa2Cu3Oy (YBCO) single crystals, from which we have simultaneously...
Antiferromagnetic correlations near the lower edge of superconducting dome in YBCO6+x (2007)
Yamani, Z., Buyers, W. J. L., Wang, F., Kim, Y. -J., Liang, R., Bonn, D., ...
Neutron scattering from high-quality YBCO6.334 single crystals with a T$_c$ of 8.4 K shows that there is no coexistence with long-range antiferromagnetic order at this very low, near-critical doping...
Evidence for decay of spin-waves above the pseudogap in underdoped YBa2Cu3O6.35 (2007)
Stock, C., Cowley, R. A., Buyers, W. J. L., Coldea, R., Broholm, C., Frost, C. D., ...
The magnetic spectrum at high-energies in heavily underdoped YBa$_{2}$Cu$_{3}$O$_{6.35}$ (T$_{c}$=18 K) has been determined throughout the Brillouin zone. At low-energy the scattering forms a cone of...
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...
Avoided Quantum Criticality in YBa_2Cu_3O_y and La_{2-x}Sr_xCuO_4 (2006)
Sonier, J. E., Callaghan, F. D., Ando, Y., Kiefl, R. F., Brewer, J. H., Kaiser, C. V., ...
Spin-glass magnetism confined to individual weakly interacting vortices is detected in two different families of high-transition-temperature (T_c) superconductors, but only in samples on the...
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...
Nitrogen based magnetic semiconductors (2006)
Elfimov, I. S., Rusydi, A., Csiszar, S. I., Hu, Z., Hsieh, H. H., Lin, H. -J., ...
We describe a possible pathway to new magnetic materials with no conventional magnetic elements present. The substitution of Nitrogen for Oxygen in simple non magnetic oxides leads to holes in N 2$p$...
Research on Cool Storage Time of a Phase Change Wallboard Room in the Summer (2006)
Through testing and analysis of the parameters of the indoor thermal property in a phase change wallboard room and an ordinary room, the effects of using phase change wallboards on indoor temperature...
State-of-the-Art and Outlook: Thermal Properties of Phase Change Wallboard Rooms (2006)
Phase change energy storage (PCES) has become more and more important in air conditioning and construction energy conservation, and has also become the focus of international research. This paper...
Research on Cool Storage Time of a Phase Change Wallboard Room in the Summer (2006)
Through testing and analysis of the parameters of the indoor thermal property in a phase change wallboard room and an ordinary room, the effects of using phase change wallboards on indoor temperature...
State-of-the-Art and Outlook: Thermal Properties of Phase Change Wallboard Rooms (2006)
Phase change energy storage (PCES) has become more and more important in air conditioning and construction energy conservation, and has also become the focus of international research. This paper...
Sonier, J. E., Callaghan, F. D., Brewer, J. H., Hardy, W. N., Bonn, D. A., Liang, R.
This paper has been withdrawn by the authors, because of results obtained from a more exhaustive study of both YBa_2Cu_3O_y and La_{2-x}Sr_xCuO_4 (see cond-mat/0610051).
Stock, C., Buyers, W. J. L., Yamani, Z., Broholm, C., Chung, J. -H., 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...
On the Error Analysis of Single-Channel Free-Access Collision Resolution Algorithm (2004)
Future wireless ATM networks proposed for providing OC-3 and above data rates generally employ demand assigned multiple-access protocols over time division multiplexed channels.
On throughput analysis of the Mars In-situ ARQ Protocol (2004)
Liang, R., Kwan, B., Florens, C.
In this paper, an analytical framework for modeling the COP-1 protocol is presented for both AWGN channels along with bursty fading channels.
Stock, C., Buyers, W. J. L., Cowley, R. A., Clegg, P. S., Coldea, R., Frost, C. D., ...
We have investigated the spin fluctuations at energy transfers up to ~110 meV, well above the resonance energy (33 meV) in the YBa2Cu3O6.5 ortho-II superconductor using neutron time-of-flight and...
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...
Transport in ultraclean YBa2Cu3O7: Neither unitary nor Born impurity scattering (2004)
Hill, R.W., Lupien, C., Sutherland, M., Boaknin, E., Hawthorn, D.G., Proust, C., ...
The metal-insulator transition in cuprates revisited (2004)
Proust, C., Sutherland, M., Taillefer, L., Nardone, M., Haanappel, E., Bonn, D., ...
Coherence, incoherence and scaling along the c axis of YBa_2Cu_3O_{6+x} (2003)
Homes, C. C., Dordevic, S. V., Bonn, D. A., Liang, R., Hardy, W. N., Timusk, T.
The optical properties of single crystals of YBa_2Cu_3O_{6+x} have been examined along the c axis above and below the critical temperature (T_c) for a wide range of oxygen dopings. The temperature...
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...
Stock, C., Buyers, W. J. L., Liang, R., Peets, D., Tun, Z., Bonn, D., ...
We describe the relation between spin fluctuations and superconductivity in a highly-ordered sample of YBaCu3O6.5 using both polarized and unpolarized neutron inelastic scattering. The spin...
Doping dependence of superconducting gap in YBa_2Cu_3O_y from universal heat transport (2003)
Sutherland, Mike, Hawthorn, D. G., Hill, R. W., Ronning, F., Wakimoto, S., Zhang, H., ...
Thermal transport in the T -> 0 limit was measured as a function of doping in high-quality single crystals of the cuprate superconductor YBa_2Cu_3O_y. The residual linear term kappa_0/T is found to...
Doping dependence of superconducting gap in Yba2Cu3Oy from universal heat transport (2003)
Sutherland, M., Hawthorn, D.G., Hill, R.W., Ronning, F., Wakimoto, S., Zhang, H., ...
Hole concentration and phonon renormalization in Ca-doped YBa_2Cu_3O_y (6.76 < y < 7.00) (2002)
Hewitt, K. C., Chen, X. K., Roch, C., Chrzanowski, J., Irwin, J. C., Altendorf, E. H., ...
In order to access the overdoped regime of the YBa_2Cu_3O_y phase diagram, 2% Ca is substituted for Y in YBa_2Cu_3O_y (y = 7.00,6.93,6.88,6.76). Raman scattering studies have been carried out on...
The high-field phase diagram of the cuprates derived from the Nernst effect (2002)
Wang, Yayu, Ong, N. P., Xu, Z. A., Kakeshita, T., Uchida, S., Bonn, D. A., ...
Measurements of the Nernst signal in the vortex-liquid state of the cuprates to high fields (33 T) reveal that vorticity extends to very high fields even close to the zero-field critical temperature...
Neutron scattering search for static magnetism in oxygen ordered YBa2Cu3O6.5 (2002)
Stock, C., Buyers, W. J. L., Tun, Z., Liang, R., Peets, D., Bonn, D., ...
We present elastic and inelastic neutron scattering results on highly oxygen ordered YBa2Cu3O6.5 ortho-II. We find no evidence for the presence of ordered magnetic moments to a sensitivity of 0.003...
Evidence for Static Magnetism in the Vortex Cores of Ortho-II YBa$_2$Cu$_3$O$_{6.50}$ (2001)
Miller, R. I., Kiefl, R. F., Brewer, J. H., Sonier, J. E., Chakhalian, J., Dunsiger, S., ...
Evidence for static alternating magnetic fields in the vortex cores of underdoped YBa$_2$Cu$_3$O$_{6+x}$ is reported. Muon spin rotation measurements of the internal magnetic field distribution of...
Sonier, J. E., Brewer, J. H., Kiefl, R. F., Heffner, R. H., Poon, K., Stubbs, S. L., ...
Zero-field muon spin relaxation (ZF-$\mu$SR) measurements were undertaken on under- and overdoped samples of superconducting YBa$_2$Cu$_3$O$_{6+x}$ to determine the origin of the weak static...
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...
Observation of the Transverse Optical Plasmon in SmLa0.8Sr0.2CuO4-d (2001)
Dulic, D., Pimenov, A., Van Der Marel, D., Broun, D. M., Kamal, S., Hardy, W. N., ...
We present microwave and infrared measurements on SmLa0.8Sr0.2CuO4-d, which are direct evidence for the existence of a transverse optical plasma mode, observed as a peak in the c-axis optical...
Zhang, Y., Ong, N. P., Anderson, P. W., Bonn, D. A., Liang, R., Hardy, W. N.
In high-purity crystals of YBa_2Cu_3O_7, the quasiparticle (qp) lifetime \tau and the (weak-field) thermal Hall conductivity \kappa_{xy} undergo dramatic increases below 90K. We present a detailed...
Melting and Dimensionality of the Vortex Lattice in Underdoped YBa2Cu3O6.60 (1999)
Sonier, J. E., Brewer, J. H., Kiefl, R. F., Bonn, D. A., Chakhalian, J., Dunsiger, S. R., ...
Muon spin rotation measurements of the magnetic field distribution in the vortex state of the oxygen deficient high-Tc superconductor YBa{2}Cu{3}O{6.60} reveal a vortex-lattice melting transition at...
Field Induced Reduction of the Low Temperature Superfluid Density in YBa2Cu3O6.95 (1999)
Sonier, J. E., Brewer, J. H., Kiefl, R. F., Morris, G. D., Miller, R. I., Bonn, D. A., ...
A novel high magnetic field (8 T) spectrometer for muon spin rotation has been used to measure the temperature dependence of the in-plane magnetic penetration depth in YBa2Cu3O6.95. At low H and low...
Zimmermann, M. V., Frello, T., Andersen, N. H., Madsen, J., Käll, M., Schmidt, O., ...
High energy x-ray diffraction is used to investigate the bulk oxygen ordering properties of YBa_2Cu_3O_{6+x}. Superstructures of Cu-O chains aligned along the b axis and ordered with periodicity ma,...
Sisson, D. L., Doettinger, S. G., Kapitulnik, A., Liang, R., Bonn, D. A., Hardy, W. N.
The magnetic field dependence of the specific heat of Zn-doped single crystals of YBa_{2}Cu_3O_{6.95} was measured between 2 and 10 K and up to 8 Tesla. Doping levels of 0, 0.15%, 0.31%, and 1% were...
Expansion of the Vortex Cores in YBa2Cu3O6.95 at Low Magnetic Fields (1998)
Sonier, J. E., Kiefl, R. F., Brewer, J. H., Bonn, D., Dunsiger, S., Liang, R., ...
Muon spin rotation spectroscopy has been used to measure the effective size of the vortex cores in optimally doped YBa2Cu3O6.95 as a function of temperature and magnetic field deep in the...
c-axis electrodynamics of ybco (1998)
Hosseini, A., Kamal, S., Bonn, D. A., Liang, R., Hardy, W. N.
New measurements of surface impedance in ybco show that the c-axis penetration depth and conductivity below Tc exhibit behaviour different from that observed in the planes. The c-axis penetration...
Homes, C. C., Timusk, T., Bonn, D. A., Liang, R., Hardy, W. N.
The reflectance of high-quality, unpolished single crystals of YBa_2Cu_3O_{6+x}, for the doping range x=0.50 -> 0.95, has been measured with radiation polarized along the c axis from approx 50...
Optical phonons along the c axis of YBa_2Cu_3O_{6+x}, for x=0.5 -> 0.95 (1995)
Homes, C. C., Timusk, T., Bonn, D. A., Liang, R., Hardy, W. N.
The c-axis polarized phonon spectra of single crystals of YBCO_{6+x} have been measured for the doping range x=0.5 -> 0.95, between 10 K and 300 K. The low background electronic conductivity,...
Dimensional measurement of surfaces and their sampling (1993)
The number of the discrete samples for the dimensional measurement of machined surfaces and thier coordinates is investigated. Counter to intuition, there need not be quadratically more samples than...
Ceftazidime versus imipenem-cilastatin as initial monotherapy for febrile neutropenic patients.
Liang, R, Yung, R, Chiu, E, Chau, P Y, Chan, T K, Lam, W K, ...
One hundred febrile episodes in 89 neutropenic patients after cytotoxic chemotherapy were randomized to be treated with either ceftazidime or imipenem as initial monotherapy. The clinical...
Qin, Z, Peng, K, Zhou, X, Liang, R, Zhou, Q, Chen, H, ...
Streptomyces hygroscopicus 10-22 could not be transformed with any of the commonly used Streptomyces plasmid vectors and was resistant to plaque formation by the Streptomyces phages phi C31 and R4....
Monitoring of leukocyte cytomegalovirus DNA in bone marrow transplant recipients by nested PCR.
Yuen, K Y, Lo, S K, Chiu, E K, Wong, S S, Lau, Y L, Liang, R, ...
A nested PCR assay for the detection of human cytomegalovirus (CMV) DNA was evaluated by weekly monitoring of blood samples taken from 101 bone marrow transplant (BMT) recipients. When peripheral...
Lau, G K, Wu, P C, Liang, R, Yuen, S T, Lim, W L
Delayed clearance of hepatitis B surface antigen was previously reported in a 38 year old woman after high dose chemotherapy with autologous peripheral blood stem cell rescue. Sixteen months later,...
Acute leukemia associated with mediastinal germ cell tumor. De novo versus therapy-related leukemia.
Ceftazidime versus imipenem-cilastatin as initial monotherapy for febrile neutropenic patients.
Liang, R, Yung, R, Chiu, E, Chau, P Y, Chan, T K, Lam, W K, ...
One hundred febrile episodes in 89 neutropenic patients after cytotoxic chemotherapy were randomized to be treated with either ceftazidime or imipenem as initial monotherapy. The clinical...
Qin, Z, Peng, K, Zhou, X, Liang, R, Zhou, Q, Chen, H, ...
Streptomyces hygroscopicus 10-22 could not be transformed with any of the commonly used Streptomyces plasmid vectors and was resistant to plaque formation by the Streptomyces phages phi C31 and R4....
Monitoring of leukocyte cytomegalovirus DNA in bone marrow transplant recipients by nested PCR.
Yuen, K Y, Lo, S K, Chiu, E K, Wong, S S, Lau, Y L, Liang, R, ...
A nested PCR assay for the detection of human cytomegalovirus (CMV) DNA was evaluated by weekly monitoring of blood samples taken from 101 bone marrow transplant (BMT) recipients. When peripheral...
Lau, G K, Wu, P C, Liang, R, Yuen, S T, Lim, W L
Delayed clearance of hepatitis B surface antigen was previously reported in a 38 year old woman after high dose chemotherapy with autologous peripheral blood stem cell rescue. Sixteen months later,...