Vibrational Pseudo-Diffusive Motion of the Oxygen Octahedra in La2CuO4 from Anelastic and 139La Quadrupolar Relaxation
| العنوان: | Vibrational Pseudo-Diffusive Motion of the Oxygen Octahedra in La2CuO4 from Anelastic and 139La Quadrupolar Relaxation |
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| المؤلفون: | Carlos Roberto Grandini, F. Cordero, A. Campana, Rosario Cantelli, Maurizio Corti, Attilio Rigamonti |
| المصدر: | Stripes and Related Phenomena ISBN: 0306464195 |
| بيانات النشر: | Kluwer Academic Publishers, 2006. |
| سنة النشر: | 2006 |
| مصطلحات موضوعية: | Octahedron, Effective energy, Oxygen octahedra, Condensed matter physics, Chemistry, Dynamics (mechanics), Relaxation (NMR), Motion (geometry), Stoichiometry, Spectral line |
| الوصف: | The vibrational dynamics in nearly stoichiometric La2CuO4+δ is studied by means of anelastic and 139La NQR relaxation. After lowering δ to values of the order of 0.001, a relaxational peak remains in both the anelastic and NQR spectra with a mean relaxation time τ=1.7×10−12 exp[(2800 K)/T]s. Such a process is attributed to the motion of CuO6 octahedra in doublewell potentials whose cooperative character increases the effective energy barrier to the observed value. It is speculated that the freezing of the motion of the octahedra may correspond to the locking of the stripes. |
| ردمك: | 978-0-306-46419-5 0-306-46419-5 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::f748ba20db6db694b7af6a6f1f2ae1baTest https://doi.org/10.1007/0-306-47100-0_33Test |
| رقم الانضمام: | edsair.doi...........f748ba20db6db694b7af6a6f1f2ae1ba |
| قاعدة البيانات: | OpenAIRE |
| ردمك: | 9780306464195 0306464195 |
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