Zobrazeno 1 - 10
of 216
pro vyhledávání: '"Kreisel, Jens"'
Autor:
Toulouse, Constance, Amoroso, Danila, Oliva, Robert, Xin, Cong, Bouvier, Pierre, Fertey, Pierre, Veber, Philippe, Maglione, Mario, Ghosez, Philippe, Kreisel, Jens, Guennou, Mael
Publikováno v:
Physical Review B, 106, 064105, 2022
In this paper, we revisit the high-pressure behavior of BaZrO3 by a combination of first-principle calculations, Raman spectroscopy, and x-ray diffraction under high pressure. We confirm experimentally the cubic-to-tetragonal transition at 10 GPa and
Externí odkaz:
http://arxiv.org/abs/2205.06594
Autor:
Hill, Christina, Weber, Mads C., Lehmann, Jannis, Leinen, Tariq, Fiebig, Manfred, Kreisel, Jens, Guennou, Mael
Publikováno v:
APL Materials 8, 081108 (2020)
Bismuth vanadate (BiVO4) has recently been under focus for its potential use in photocatalysis thanks to its well-suited absorption edge in the visible light range. Here, we characterize the optical absorption of a BiVO4 single crystal as a function
Externí odkaz:
http://arxiv.org/abs/2004.10183
Epitaxial thin films of SrRuO3 with large strain disorder were grown using pulsed laser deposition method which showed two distinct transition temperatures in Magnetic measurements. For the first time, we present visual evolution of magnetic domains
Externí odkaz:
http://arxiv.org/abs/2001.03901
Akademický článek
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Autor:
Toulouse, Constance, Amoroso, Danila, Xin, Cong, Veber, Philippe, Hatnean, Monica Ciomaga, Balakrishnan, Geetha, Maglione, Mario, Ghosez, Philippe, Kreisel, Jens, Guennou, Mael
Publikováno v:
Phys. Rev. B 100, 134102 (2019)
BaZrO3 is a perovskite that remains in the simple cubic phase at all temperatures, hence with no first-order Raman-active phonon mode allowed by symmetry. Yet, it exhibits an intense Raman spectrum with sharp and well-defined features. Here, we repor
Externí odkaz:
http://arxiv.org/abs/1907.02008
Publikováno v:
G.F. Nataf, N. Barrett, J. Kreisel, and M. Guennou, J. Phys. Condens. Matter 30, 035902 (2018)
Ferroic domain walls are currently investigated by several state-of-the art techniques in order to get a better understanding of their distinct, functional properties. Here, Principal Component Analysis (PCA) of Raman maps is used to study ferroelect
Externí odkaz:
http://arxiv.org/abs/1806.08642
Publikováno v:
G.F. Nataf, M. Guennou, A. Hau{\ss}mann, N. Barrett, and J. Kreisel, Phys. Status Solidi - Rapid Res. Lett. 10, 222 (2016)
The domain structure of uniaxial ferroelectric lithium niobate single crystals is investigated using Raman spectroscopy mapping. The influence of doping with magnesium and poling at room temperature is studied by analysing frequency shifts at domain
Externí odkaz:
http://arxiv.org/abs/1802.02767
Publikováno v:
Phys. Rev. B 96, 054102 (2017)
The rotation of octahedra (octahedral tilting) is common in ABO3 perovskites and relevant to many physical phenomena, ranging from electronic and magnetic properties, metal-insulator transitions to improper ferroelectricity. Hydrostatic pressure is a
Externí odkaz:
http://arxiv.org/abs/1706.04543
Autor:
Weber, Mads Christof, Guennou, Mael, Zhao, Hong Jian, Íñiguez, Jorge, Vilarinho, Rui, Almeida, Abílio, Moreira, Joaquim Agostinho, Kreisel, Jens
Publikováno v:
Phys. Rev. B 94, 214103 (2016)
We report a Raman scattering study of six rare earth orthoferrites RFeO3, with R = La, Sm, Eu, Gd, Tb, Dy. The use of extensive polarized Raman scattering of SmFeO3 and first-principles calculations enable the assignment of the observed phonon modes
Externí odkaz:
http://arxiv.org/abs/1609.07987
Autor:
Weber, Mads Christof, Guennou, Mael, Toulouse, Constance, Cazayous, Maximilien, Gillet, Yannick, Gonze, Xavier, Kreisel, Jens
Publikováno v:
Phys. Rev. B 93, 125204 (2016)
Knowledge of the electronic band structure of multiferroic oxides, crucial for the understanding and tuning of photo-induced effects, remains very limited even in the model and thoroughly studied BiFeO3. Here, we investigate the electronic band struc
Externí odkaz:
http://arxiv.org/abs/1510.03754