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Infrared phonon spectroscopy on the Cairo pentagonal antiferromagnet Bi2Fe4O9: a study through the pressure induced structural transition

Autor: Verseils, M., Litvinchuk, A. P., Brubach, J-B, Roy, P., Beauvois, K., Ressouche, E., Skumryev, V., Gospodinov, M., Simonet, V., deBrion, S.

Magnetic and crystallographic transitions in the Cairo pentagonal magnet Bi2Fe4O9 are investigated by means of infrared synchrotron-based spectroscopy as a function of temperature (20 - 300 K) and pressure (0 - 15.5 GPa). One of the phonon modes is s

Externí odkaz: http://arxiv.org/abs/2104.09384

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Effects of Ca substitution on quasi-acoustic sliding modes in Sr$_{14-x}$Ca$_x$Cu$_{24}$O$_{41}$

Autor: Constable, E., Squires, A. D., Horvat, J., Lewis, R. A., Appadoo, D., Plathe, R., Roy, P., Brubach, J. -B., deBrion, S., Pimenov, A., Deng, G.

Publikováno v: Phys. Rev. B 100, 184305 (2019)

The low energy lattice dynamics of the quasi-periodic spin-ladder cuprate Sr$_{14-x}$Ca$_x$Cu$_{24}$O$_{41}$ are investigated using terahertz frequency synchrotron radiation. A high density of low-lying optical excitations are present in the 1-3 THz

Externí odkaz: http://arxiv.org/abs/1907.09739

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Magnetic and dielectric order in the kagome-like francisite Cu$_3$Bi(SeO$_3$)$_2$O$_2$Cl

Autor: Constable, E., Raymond, S., Petit, S., Ressouche, E., Bourdarot, F., Debray, J., Josse, M., Fabelo, O., Berger, H., deBrion, S., Simonet, V.

Publikováno v: Phys. Rev. B 96, 014413 (2017)

We report a single-crystal neutron diffraction and inelastic neutron scattering study on the spin 1/2 cuprate Cu$_3$Bi(SeO$_3$)$_2$O$_2$Cl, complemented by dielectric and electric polarization measurements. The study clarifies a number of open issues

Externí odkaz: http://arxiv.org/abs/1704.00915

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Double Vibronic process in the quantum spin ice candidate Tb$_2$Ti$_2$O$_7$ revealed by terahertz spectroscopy

Autor: Constable, E., Ballou, R., Robert, J., Decorse, C., Brubach, J. -B., Roy, P., Lhotel, E., Del-Rey, L., Simonet, V., Petit, S., deBrion, S.

Publikováno v: Phys. Rev. B 95, 020415 (2017)

The origin of quantum fluctuations responsible for the spin liquid state in Tb$_2$Ti$_2$O$_7$ has remained a long standing problem. By synchrotron-based terahertz measurements, we show evidence of strong coupling between the magnetic and lattice degr

Externí odkaz: http://arxiv.org/abs/1609.01895

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Decoupling of orbital and spin degrees of freedom in Li1-xNaxNiO2

Autor: Hopzapfel, M., Debrion, S., Darie, C., Bordet, P., Chouteau, G., Strobel, P., Sulpice, A., Nunez-Regueiro, M. D., Chappel, Eric

In the Li1-xNaxNiO2 solid solutions three different single phase regions exist: for x > 0.9, forx = 0.7 and for x < 0.3. Although the intermediate compound does not show the cooperative Jahn-Teller transition of NaNiO2, its magnetic properties remain

Externí odkaz: http://arxiv.org/abs/cond-mat/0403329

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Infrared phonon spectroscopy on the Cairo pentagonal antiferromagnet Bi 2 Fe 4 O 9 : A study through the pressure-induced structural transition

Autor: Verseils, M., Litvinchuk, A. P., Brubach, J-B, Roy, P., Beauvois, K., Ressouche, E., Skumryev, V., Gospodinov, M., Simonet, V., deBrion, S.

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2021, 103 (17), pp.174403. ⟨10.1103/PhysRevB.103.174403⟩
Physical Review B, 2021, 103 (17), pp.174403. ⟨10.1103/PhysRevB.103.174403⟩

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a17bd241e3c5a503c4cbca4a08db5cec
https://hal.archives-ouvertes.fr/hal-03381831

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