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  1. Article

    Open Access

    Stabilizing electromagnons in CuO under pressure

    Electromagnons (Electroactive spin wave excitations) could prove to be decisive in information technologies but they remain fragile quantum objects, mainly existing at low temperatures. Any future technologica...

    M. Verseils, P. Hemme, D. Bounoua, R. Cervasio, J-B. Brubach… in npj Quantum Materials (2023)

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  2. Article

    Open Access

    Lattice-shifted nematic quantum critical point in FeSe1−xSx

    We report the evolution of nematic fluctuations in FeSe1−xSx single crystals as a function of Sulfur content x across the nematic quantum critical point (QCP) xc ~ 0.17 via Raman scattering. The Raman spectra in ...

    S. Chibani, D. Farina, P. Massat, M. Cazayous, A. Sacuto, T. Urata… in npj Quantum Materials (2021)

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  3. Article

    Open Access

    Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ

    Establishing the presence and the nature of a quantum critical point in their phase diagram is a central enigma of the high-temperature superconducting cuprates. It could explain their pseudogap and strange me...

    N. Auvray, B. Loret, S. Benhabib, M. Cazayous, R. D. Zhong… in Nature Communications (2019)

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  4. No Access

    Article

    Intimate link between charge density wave, pseudogap and superconducting energy scales in cuprates

    The cuprate high-temperature superconductors develop spontaneous charge density wave (CDW) order below a temperature TCDW and over a wide range of hole do** (p). An outstanding challenge in the field is to unde...

    B. Loret, N. Auvray, Y. Gallais, M. Cazayous, A. Forget, D. Colson… in Nature Physics (2019)

  5. No Access

    Article

    Crafting the magnonic and spintronic response of BiFeO3 films by epitaxial strain

    Multiferroics are compounds that show ferroelectricity and magnetism. BiFeO3, by far the most studied, has outstanding ferroelectric properties, a cycloidal magnetic order in the bulk, and many unexpected virtues...

    D. Sando, A. Agbelele, D. Rahmedov, J. Liu, P. Rovillain, C. Toulouse… in Nature Materials (2013)

  6. No Access

    Article

    Electric-field control of spin waves at room temperature in multiferroic BiFeO3

    Magnons are collective excitations of spins in a material, and just like individual electron spins, they could form the basis for novel computing concepts. Now, determination of the almost loss-less electrical...

    P. Rovillain, R. de Sousa, Y. Gallais, A. Sacuto, M. A. Méasson… in Nature Materials (2010)

  7. No Access

    Article

    Possible interplay between a two phonon mode and high energy magnetic excitations in BiFeO3

    We have performed Raman measurements on high energy excitations in BiFeO3 single crystals as a function of both temperature and laser excitation lines. A strong feature observed at 1250 cm-1 in the Raman spectra ...

    M. Cazayous, A. Sacuto, D. Lebeugle, D. Colson in The European Physical Journal B (2009)

  8. No Access

    Article

    Two energy scales and two distinct quasiparticle dynamics in the superconducting state of underdoped cuprates

    The superconducting temperature Tc of hole-doped high-temperature superconductors has a dome-like shape as a function of hole concentration, with a maximum Tc at ‘optimal’ do**. On the underdoped side, the supe...

    M. Le Tacon, A. Sacuto, A. Georges, G. Kotliar, Y. Gallais, D. Colson… in Nature Physics (2006)

  9. No Access

    Chapter

    Analysis of the Superconducting Gap by Electronic Raman Scattering in HgBa 2 Ca 2 Cu 3 O 8+δ Single Crystals

    In conclusion, we have presented for the first time pure electronic Raman spectra of Hg-1223 single crystals. Our most significant result is the observation of two gap maxima at 530 and 800 cm ...

    A. Sacuto, R. Combescot in The Gap Symmetry and Fluctuations in High-Tc Superconductors (1998)