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Neutron and Raman Scattering Studies of Hgba2CuO4+δ |
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| Authors: | S H Liou R Li Q Cai M Chandrasekhar H Luo M Chen W B Yelon A L Vasiliev E P Kvam |
| Affiliation: | 1. Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588, USA 2. Department of Physics, University of Missouri, Columbia, MO, 65211, USA 3. Research Reactor Center, University of Missouri, Columbia, MO, 65211, USA 4. School of Materials Engineering, Purdue University, W. Lafayette, IN, 47907, USA |
| Abstract: | The HgBa2CuO4+δ sample was characterized by Neutron diffraction and magnetic measurements. Both of the measurements indicate a high purity of the sample. Raman measurement was performed on a HgBa2CuO4+δ compound of Tc = 96 K. The apical oxygen vibration at 592 cm?1 was found to show (a) an above Tc anomaly, and (b) frequency hardening and linewidth broadening below the superconducting phase transition. The latter is attributed to the coupling of the phonon to the electronic excitation and related to the opening of the superconducting gap below the phonon frequency. |
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