Zobrazeno 1 - 10
of 769
pro vyhledávání: '"A Sacuto"'
Publikováno v:
Phys. Rev. B 108, 165111 (2023)
We study the Raman response, for $B_{1g}$ and $B_{2g}$ light-polarization symmetries, of the charge density wave phase appearing in the underdoped region of cuprate superconductors. We show that the $B_{2g}$ response provides a distinctive signature
Externí odkaz:
http://arxiv.org/abs/2305.11688
Autor:
Katsumi, Kota, Alekhin, Alexandr, Souliou, Sofia-Michaela, Merz, Michael, Haghighirad, Amir-Abbas, Tacon, Matthieu Le, Houver, Sarah, Cazayous, Maximilien, Sacuto, Alain, Gallais, Yann
Publikováno v:
Physical Review Letters 130, 106904 (2023)
Ta$_2$NiSe$_5$ is an excitonic insulator candidate showing the semiconductor/semimetal-to-insulator (SI) transition below $T_{\text{c}}$ = 326 K. However, since a structural transition accompanies the SI transition, deciphering the role of electronic
Externí odkaz:
http://arxiv.org/abs/2211.08537
Autor:
Mezidi, M., Alekhin, A., Gu, G. D., Colson, D., Houver, S., Cazayous, M., Gallais, Y., Sacuto, A.
Publikováno v:
Physical Review B 106, 174513 (2022)
We followed step by step the transition from an antiferromagnetic (AF) Mott insulator to a superconducting (SC) metal in the Bi$_2$Sr$_2$CaCu$_{2}$O$_{8+\delta}$ (Bi-2212) cuprate using the electronic Raman scattering spectroscopy. This was achieved
Externí odkaz:
http://arxiv.org/abs/2207.10166
Autor:
Philippe, J. -C., Lespinas, A., Faria, J., Forget, A., Colson, D., Houver, S., Cazayous, M., Sacuto, A., Paul, I., Gallais, Y.
Publikováno v:
Phys. Rev. Lett. 129, 187002 (2022)
Anisotropic strain is an external field capable of selectively addressing the role of nematic fluctuations in promoting superconductivity. We demonstrate this using polarization-resolved elasto-Raman scattering to probe the evolution of nematic fluct
Externí odkaz:
http://arxiv.org/abs/2204.12213
Autor:
Philippe, J. -C., Faria, J., Forget, A., Colson, D., Houver, S., Cazayous, M., Sacuto, A., Gallais, Y.
We report a Raman scattering study of nematic degrees of freedom in the iron-based superconductor parent compound BaFe$_2$As$_2$ under tunable uniaxial strain. We demonstrate that the polarization resolved arsenic (As) phonon intensity can be used to
Externí odkaz:
http://arxiv.org/abs/2110.06175
Autor:
Hemme, Pierre, Djemia, Philippe, Rovillain, Pauline, Gallais, Yann, Sacuto, Alain, Forget, Anne, Colson, Dorothée, Charron, Eric, Perrin, Bernard, Belliard, Laurent, Cazayous, Maximilien
Publikováno v:
J. Phys.: Condens. Matter 33, 495402 (2021)
Time resolved pump and probe acoustics and first-principles calculations were employed to assess elastic properties of the TbMnO3 perovskite manganite having orthorhombic symmetry. Measuring sound velocities of bulk longitudinal and shear acoustic wa
Externí odkaz:
http://arxiv.org/abs/2109.15023
Autor:
Philippe, J. -C., Baptiste, B., Sow, C., Maeno, Y., Forget, A., Colson, D., Cazayous, M., Sacuto, A., Gallais, Y.
Publikováno v:
Phys. Rev. B 103, 235147 (2021)
We report a polarization-resolved Raman spectroscopy study of the orbital dependence of the quasiparticles properties in the prototypical multi-band Fermi liquid Sr\textsubscript{2}RuO\textsubscript{4}. We show that the quasiparticle scattering rate
Externí odkaz:
http://arxiv.org/abs/2103.16698
Exploration of the Hg-based cuprate superconductors by Raman spectroscopy under hydrostatic pressure
Autor:
Auvray, N., Loret, B., Chibani, S., Grasset, R., Guarnelli, Y., Parisiades, P., Forget, A., Colson, D., Cazayous, M., Gallais, Y., Sacuto, Alain
Publikováno v:
Phys. Rev. B 103, 195130 (2021)
The superconducting phase of the $\mathrm{HgBa}_2\mathrm{CuO}_{4+\delta}$ (Hg-1201) and $\mathrm{HgBa}_2\mathrm{Ca}_2\mathrm{Cu}_3\mathrm{O}_{8+\delta}$ (Hg-1223) cuprates has been investigated by Raman spectroscopy under hydrostatic pressure. Our an
Externí odkaz:
http://arxiv.org/abs/2102.13432
Autor:
Hemme, Pierre, Djemia, Philippe, Rovillain, Pauline, Gallais, Yann, Sacuto, Alain, Forget, Anne, Colson, Dorothee, Charron, Eric, Perrin, Bernard, Belliard, Laurent, Cazayous, Maximilien
Publikováno v:
Appl. Phys. Lett. 118, 062902 (2021)
We have performed elasticity measurements in the bulk multiferroic BiFeO3 (BFO) using acoustical pump and probe spectroscopy. The sound velocities of the (quasi)-longitudinal and of the two (quasi)-transverse acoustic waves along three independent di
Externí odkaz:
http://arxiv.org/abs/2102.05580
Autor:
Beaumont, M. Revelli, Gallais, Y., Sacuto, A., Jacob, K., Valade, L., de Caro, D., Faulmann, C., Cazayous, M.
Publikováno v:
Phys. Rev. B 103, 035139 (2021)
We measured the optical signature of the charge density waves (CDWs) in the multiband conductor TTF[Ni(dmit)2]2 by electronic Raman scattering. At low energies, a hump develops below 60 K. This hump is associated to the amplitude mode of the CDW with
Externí odkaz:
http://arxiv.org/abs/2101.09455