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Long-wave Raman active phonons in YBa2Cu3O7−x crystals with site-selective isotope substitution

✍ Scribed by E.Ya. Sherman


Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
202 KB
Volume
216
Category
Article
ISSN
0921-4534

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✦ Synopsis


Site-selective isotope substitution in YBa2Cu307_x crystals is considered and shown to considerably change the phonon spectrum and Raman scattering picture due to a strong mixing of vibrational modes.


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Interaction of axial infrared-active pho
✍ V.M. Burlakov; K.F. Renk; A. Gaymann; J. Münzel; H.P. Geserich 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 589 KB

We report on an infrared study of the resonance interaction between phonons and electronic excitations in an YBa2Cu307 single crystal. Our results show that two transverse axial phonon modes (to= 300 cm-t and to-~ 550 cm -1 ) are strongly coupled to the c-polarized electronic continuum resulting in