Copper and oxygen vibrations in La2CuO4 and YBa2Cu3O7 |
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| Institution: | 1. Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan;2. Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan;3. Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan;4. Institute for Nanoscience Design, Osaka University, Toyonaka, Osaka 560-0043, Japan;5. Handairigaku Techno-Research, Toyonaka, Osaka 560-0043, Japan;1. Department of Chemistry, University of Cyprus, 1678 Nicosia, Cyprus;2. Department of Chemistry, University of Florida, Gainesville, FL 32611, United States;3. School of Chemistry, National University of Ireland Galway, Galway, Ireland;4. Department of Chemistry, University of Patras, 26504 Patras, Greece;1. Institute for Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan;2. Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan;3. Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan;4. RIKEN Center for Computational Science, Kobe, Hyogo 650-0047, Japan;5. Center of Computational Sciences, Tsukuba University, Tsukuba, Ibaraki 305-8577, Japan;6. Insitute for Nanoscience Design, Toyonaka, Osaka University, Toyonaka 560-0043, Japan |
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| Abstract: | We perform eV neutron scattering experiments (neutron energy > 1 eV) on copper metal, CuO, La2CuO4 and YBa2Cu3O7, and neutron absorption experiments of HoBa2Cu3O7, and determined the mean kinetic energy of O, Cu and other atoms in these materials. The Debye temperatures of Cu atoms in La2CuO4 and YBa2Cu3O7 were estimated to be extremely large, about 1500 and 2000 K, respectively. |
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