Sensitivity of the phonon in YBCO to superconductivity by infrared studies on epitaxial film |
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| Affiliation: | 1. Department of Physics, Zhongshan University, Guangzhou 510275, People''s Republic of China;2. Department of Physics, Nankai University, Tianjin 300071, People''s Republic of China;3. Department of Electric Science, Nankai University, Tianjin 300071, People''s Republic of China;4. Department of Physics, Beijing University, Beijing 100871, People''s Republic of China;1. ENEA-Frascati, via E. Fermi 45, 00044 Frascati, RM, Italy;2. University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy;3. CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain;4. Center for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, 20133 Milano, Italy;5. ENEA-Brasimone, 40032 Camugnano, BO, Italy;6. Karlsruhe Institute of Technology (KIT), Karlsruhe, Baden-Württemberg, Germany;1. ElectroScience Laboratory and Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43212, USA;2. Laboratory for Autonomy in Data-Driven and Complex Systems, Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH 43210, USA;1. Human Resources Development Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, India;2. Homi Bhabha National Institute, BARC Training School Complex, Anushakti Nagar, Mumbai 400094, India;3. National Taiwan University, Department of Physics, Taipei, Taiwan, ROC |
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| Abstract: | Epitaxial films of YBCO superconductors whose C axes are primarily perpendicular to the film surface, were prepared. The samples, which were treated by means of a gettered annealing technique, were investigated by the X-ray diffraction pattern method (XRD) and infrared (IR) reflectance spectra in the 140–800 cm−1 spectral range. The strengths of the phonon structures are influenced greatly by the superconductivity of the sample, which can be determined by the annealing conditions. The relation between the resulting IR activity of phonons and the superconductivity is clear and the important role of phonons in superconductivity is demonstrated. |
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