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Akademický článek

Symmetry reduction for tunneling defects due to strong couplings to phonons

Autor: P Nalbach, M Schechter

Publikováno v: New Journal of Physics, Vol 19, Iss 6, p 063030 (2017)

Tunneling two-level systems (TLSs) are ubiquitous in amorphous solids, and form a major source of noise in systems such as nano-mechanical oscillators, single electron transistors, and superconducting qubits. Occurance of defect tunneling despite the

Externí odkaz: https://doaj.org/article/81a4f9095b284e798f116a06da3ad221

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ATOMIC PACKING AND LOW ENERGY VIBRATIONS IN B2O3 GLASSES, COMPACTED UNDER GPa PRESSURES

Autor: Carini Jr., Giovanni, Carini, Giuseppe, D'Angelo, Giovanna, Federico, Mauro, Romano, Valentino

Publikováno v: Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, Vol 95, Iss 1, p A3 (2017)
Atti della Accademia Peloritana dei Pericolanti-Classe di Scienze Fisiche, Matematiche e Naturali; Vol 95, No 1 (2017); A3
Atti della Accademia Peloritana dei Pericolanti. Classe di Scienze Fisiche, Matematiche e Naturali; Vol 95, No 1 (2017); A3

Vibrational properties of crystals are well described by Debye's theory. This doesn't hold for vitreous systems, where an excess density of low frequency vibrational states, called Boson peak, appears. In this work we study glassy boron trioxide (B2O

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::24e84fd3b223386a79378321ba7f7b6d
http://hdl.handle.net/11570/3109864

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Akademický článek

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Akademický článek

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Surface-acoustic-wave-driven ferromagnetic resonance in (Ga,Mn)(As,P) epilayers

Autor: Jean-Yves Prieur, J.-Y. Duquesne, Laura Thevenard, Loïc Becerra, Serge Vincent, Ludovic Largeau, Catherine Gourdon, H. J. von Bardeleben

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2014, 90, pp.094401. ⟨10.1103/PhysRevB.90.094401⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 90, pp.094401. ⟨10.1103/PhysRevB.90.094401⟩

International audience; Surface acoustic waves (SAW) were generated on a thin layer of the ferromagnetic semiconductor (Ga,Mn)(As,P). The out-of-plane uniaxial magnetic anisotropy of this dilute magnetic semiconductor is very sensitive to the strain

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef83565c16d7950202ffe7a0de9e8956
https://hal.archives-ouvertes.fr/hal-01357676/document

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Poisson ratio and excess low-frequency vibrational states in glasses

Autor: Thierry Deschamps, Lucien Saviot, Eugène Duval

Publikováno v: Journal of Chemical Physics
Journal of Chemical Physics, American Institute of Physics, 2013, 139, pp.064506. ⟨10.1063/1.4817778⟩
Journal of Chemical Physics, American Institute of Physics, 2013, 139, pp.064506. 〈10.1063/1.4817778〉

In glass, starting from a dependence of the Angell's fragility on the Poisson ratio [V. N. Novikov and A. P. Sokolov, Nature 431, 961 (2004)], and a dependence of the Poisson ratio on the atomic packing density [G. N. Greaves, A. L. Greer, R. S. Lake

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13d9da728bcbe821d7caed483f6a1a4d
https://hal.archives-ouvertes.fr/hal-00852203/file/poisson3.pdf

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Emergence of Crystal-like Atomic Dynamics in Glasses at the Nanometer Scale

Autor: Adriano Fontana, Edmondo Gilioli, Keith Refson, Giacomo Baldi, Victor Milman, Marco Zanatta, Björn Winkler, Björn Wehinger, Giulio Monaco

Publikováno v: Physical Review Letters, Vol. 110 (2013) P. 185503
Physical review letters 110 (2013): 185503-1–185503-5. doi:10.1103/PhysRevLett.110.185503
info:cnr-pdr/source/autori:G. Baldi 1, M. Zanatta 2, E. Gilioli 1, V. Milman 3, K. Refson 4, B.Wehinger 5, B.Winkler 6, A. Fontana 7,8, and G. Monaco 5,7/titolo:Emergence of crystal-like atomic dynamics in glasses at the nanometre scale/doi:10.1103%2FPhysRevLett.110.185503/rivista:Physical review letters/anno:2013/pagina_da:185503-1/pagina_a:185503-5/intervallo_pagine:185503-1–185503-5/volume:110

The vibrational dynamics of a permanently densified silica glass is compared to the one of an $\ensuremath{\alpha}$-quartz polycrystal, the silica polymorph of the same density and local structure. The combined use of inelastic x-ray scattering exper

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::efe1be9825e233c19e86be3595dc7f37
http://hdl.handle.net/11562/950361

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