D. Bonn

Publication List Details

Period

1992 - 2008

Number

87

Co-Authors

Effective temperatures from the fluctuation-dissipation measurements in soft glassy materials (2008)

Jabbari-Farouji, S., Mizuno, D., Derks, D., Wegdam, G. H., MacKintosh, F. C., Schmidt, C. F., ...

We have investigated the validity of the fluctuation-dissipation theorem (FDT) and the applicability of the concept of effective temperature in a number of non-equilibrium soft glassy materials....

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 =...

Spin dynamics near the critical doping in weakly-superconducting underdoped YBa2Cu3O6.35 (Tc=18K) (2008)

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...

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...

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...

Stick-slip instability for viscous fingering in a gel (2007)

Puff, N., Debregeas, G., Higgins, D., Wagner, C., Bonn, D.

The growth dynamics of an air finger injected in a visco-elastic gel (a PVA/borax aqueous solution) is studied in a linear Hele-Shaw cell. Besides the standard Saffmann-Taylor instability, we observe...

Quantum phase transitions in magnetism and superconductivity: emergent spin topology seen with neutrons (2007)

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...

Aging dynamics in a colloidal glass of Laponite (2005)

Abou, B., Bonn, D., Meunier, J.

The aging dynamics of colloidal suspensions of Laponite, a synthetic clay, is investigated using dynamic light stattering (DLS) and viscometry after a quench into the glassy phase. DLS allows to...

Inertial effects in the Saffman-Taylor instability (2005)

Chevalier, C., Amar, M. Ben, Bonn, D., Lindner, A.

For the Saffman-Taylor instability, the inertia of the fluid may become important for large Reynolds numbers Re. We investigate the effects of inertia on the width of the viscous fingers...

Central mode and spin confinement near the boundary of the superconducting phase in YBa2Cu3O6.353 (Tc=18 K) (2005)

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...

From incommensurate to dispersive spin-fluctuations: The high-energy inelastic spectrum in superconducting YBa2Cu3O6.5 (2004)

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...

Droplet detachment and bead formation in visco-elastic fluids (2004)

Wagner, C., Amarouchene, Y., Bonn, D., Eggers, J.

The presence of a very small amount of high molecular weight polymer significantly delays the pinch-off singularity of a drop of water falling from a faucet, and leads to the formation of a...

Ageing, shear rejuvenation and avalanches in soft glassy materials (2004)

Bonn, D., Tanaka, H., Coussot, P., Meunier, J.

Systematic effort was made to optimize the quality of ferroelectric Bi3.25La0.75Ti3O12 thin films, that were pulsed laser deposited onto indium–tin-oxide coated glass plates, by varying the...

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...

Dynamic Stripes and Resonance in the Superconducting and Normal Phases of YBa2Cu3O6.5 Ortho-II Superconductor (2003)

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...

An intrinsic route to melt fracture in polymer extrusion: a weakly nonlinear subcritical instability of viscoelastic Poiseuille flow (2002)

Meulenbroek, M., Storm, C., Bertola, V., Wagner, C., Bonn, D., Van Saarloos, W.

As is well known, the extrusion rate of polymers from a cylindrical tube or slit (a ``die'') is in practice limited by the appearance of ``melt fracture'' instabilities which give rise to unwanted...

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...

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...

Stick-slip instability for viscous fingering in a gel (2002)

Puff, N., Debregeas, G., Higgins, D., Wagner, C., Bonn, D.

The growth dynamics of an air finger injected in a visco-elastic gel (a PVA/borax aqueous solution) is studied in a linear Hele-Shaw cell. Besides the standard Saffmann-Taylor instability, we observe...

Avalanche behaviour in yield stress fluids (2002)

Coussot, P., Nguyen, Quoc Dzuy, Huynh, H. T., Bonn, D.

We show that, above a critical stress, typical yield stress fluids (gels and clay suspensions) and soft glassy materials (colloidal glasses) start flowing abruptly and subsequently accelerate,...

Cross-over between first-order and critical wetting at the liquid-vapour interface of n-alkane/methanol mixtures: tricritical wetting and critical prewetting (2001)

Posazhennikova, A. I., Indekeu, J. O., Ross, D., Bonn, D., Meunier, J.

A mean-field theory is presented which describes the basic observations of recent experiments revealing rich wetting behaviour of n-alkane/methanol mixtures at the liquid-vapour interface. The...

Aging dynamics in a colloidal glass of Laponite (2001)

Abou, B., Bonn, D., Meunier, J.

The aging dynamics of colloidal suspensions of Laponite, a synthetic clay, is investigated using dynamic light stattering (DLS) and viscometry after a quench into the glassy phase. DLS allows to...

Aging dynamics in a colloidal glass of Laponite (2001)

Abou, B., Bonn, D., Meunier, J.

The aging dynamics of colloidal suspensions of Laponite, a synthetic clay, is investigated using dynamic light stattering (DLS) and viscometry after a quench into the glassy phase. DLS allows to...

Aging dynamics in a colloidal glass of Laponite (2001)

Abou, B., Bonn, D., Meunier, J.

The aging dynamics of colloidal suspensions of Laponite, a synthetic clay, is investigated using dynamic light stattering (DLS) and viscometry after a quench into the glassy phase. DLS allows to...