M. Le Tacon

Phonon Density of States in Nd(O$_{1-x}$F$_{x}$)FeAs (2008)

Tacon, M. Le, Krisch, M., Bosak, A., Bos, J. -W. G., Margadonna, S.

We report measurements of the phonon density-of-states in iron oxypnictide superconductors by inelastic x-ray scattering. A good agreement with ab-initio calculations that do not take into account...

The nodal gap component as a good candidate for the superconducting order parameter in cuprates (2008)

Guyard, W., Sacuto, A., Cazayous, M., Gallais, Y., Tacon, M. Le, Colson, D., ...

Although more than twenty years have passed since the discovery of high temperature cuprate superconductivity, the identification of the superconducting order parameter is still under debate. Here,...

Investigations on the relationship between $T_c$ and the superconducting gap under magnetic and non-magnetic impurity substitutions in YBa$_2$Cu$_3$O$_{7-\delta}$ (2007)

Tacon, M. Le, Sacuto, A., Gallais, Y., Colson, D., Forget, A.

We report electronic Raman scattering measurements on optimally doped YBa2Cu3O7 where Zn or Ni impurities have been substituted by Cu. Using Raman selection rules, we have probed the superconducting...

Evolution of the gaps through the cuprate phase-diagram (2007)

Guyard, W., Tacon, M. Le, Cazayous, M., Sacuto, A., Georges, A., Colson, D., ...

The actual physical origin of the gap at the antinodes, and a clear identification of the superconducting gap are fundamental open issues in the physics of high-$T_c$ superconductors. Here, we...

Coupling between quasiparticles and a bosonic mode in the normal state of HgBa$_2$CuO$_{4+\delta}$ (2006)

Gallais, Y., Tacon, M. Le, Sacuto, A., Colson, D.

We report a doping dependent study of the quasiparticles dynamics in HgBa$_2$CuO$_{4+\delta}$ via Electronic Raman Scattering. A well-defined energy scale is found in the normal state dynamics of the...

Two Energy Scales and two Quasiparticle Dynamics in the Superconducting State of Underdoped Cuprates (2006)

Tacon, M. Le, Sacuto, A., Georges, A., Kotliar, G., Gallais, Y., Colson, D., ...

The superconducting state of underdoped cuprates is often described in terms of a single energy-scale, associated with the maximum of the (d-wave) gap. Here, we report on electronic Raman scattering...

Coupling between quasiparticles and a bosonic mode in the normal state of HgBa$_2$CuO$_{4+\delta}$ (2006)

Gallais, Y., Tacon, M. Le, Sacuto, A., Colson, D.

We report a doping dependent study of the quasiparticles dynamics in HgBa$_2$CuO$_{4+\delta}$ via Electronic Raman Scattering. A well-defined energy scale is found in the normal state dynamics of the...

Coupling between quasiparticles and a bosonic mode in the normal state of HgBa$_2$CuO$_{4+\delta}$ (2005)

Gallais, Y., Tacon, M. Le, Sacuto, A., Colson, D.

We report a doping dependent study of the quasiparticles dynamics in HgBa$_2$CuO$_{4+\delta}$ via Electronic Raman Scattering. A well-defined energy scale is found in the normal state dynamics of the...

Impurity induced Local Magnetism and Density of States in the superconducting state of YBa2Cu3O7 (2005)

Ouazi, S., Bobroff, J., Alloul, H., Tacon, M. Le, Blanchard, N., Collin, G., ...

Oxygen NMR is used to probe the local influence of nonmagnetic Zn and magnetic Ni impurities in the superconducting state of optimally doped high Tc YBa2Cu3O7. Zn and Ni induce a staggered...

Effects of Magnetic and non-Magnetic Impurities on the Superconducting State of YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ (2005)

Tacon, M. Le, Sacuto, A., Gallais, Y., Sherman, E., Forget, A., Colson, D.

We report Electronic Raman Scattering measurements on optimally doped Zn and Ni substituted YBCO in A$_{1g}$ and B$_{1g}$ channels. We show that the superconducting gap energy is independant of...

Two Distinct Electronic Contributions in the Fully Symmetric Raman Response of High $T_{c}$ Cuprates (2005)

Tacon, M. Le, Sacuto, A., Colson, D.

We show by non resonant effect in HgBa$_2$CuO$_{4+\delta}$ (Hg-1201)and by Zn substitutions in YBa$_2$Cu$_3$O$_{7-\delta}$ (Y-123) compounds that the fully symmetric Raman spectrum has two distinct...

Coupling between quasiparticles and a bosonic mode in the normal state of HgBa$_2$CuO$_{4+\delta}$ (2005)

Gallais, Y., Tacon, M. Le, Sacuto, A., Colson, D.

We report a doping dependent study of the quasiparticles dynamics in HgBa$_2$CuO$_{4+\delta}$ via Electronic Raman Scattering. A well-defined energy scale is found in the normal state dynamics of the...