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Incommensurate Dynamical Properties of Optimally Doped YBa2Cu3O6.9 |
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| Authors: | Tetsuya Yokoo Masatoshi Arai Yu Shiohara Setsuko Tajima Chris D Frost Yasuo Endoh |
| Affiliation: | (1) Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Oho 1-1, Tsukuba, Ibaraki, 305-0801, Japan;(2) Superconductivity Research Laboratory, ISTEC, Shinonome 1-10-13, Koutou, Tokyo, 135-0062, Japan;(3) ISIS, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom;(4) IMR, Tohoku University, Katahira 2-1-1, Aoba, Sendai, 980-8577 Miyagi, Japan |
| Abstract: | The resonance and incommensurate peaks in optimally doped high-T
c superconductor YBa2Cu3O6.9 are observed by means of TOF neutron scattering technique. Obtained overall dynamical properties in a wide Q-E space show distinct incommensurate structure around antiferromagnetic (AF) zone center ( , ). The incommensurability of  =0.1 at 36 meV corresponds to the previous triple-axis neutron measurement. Variation of temperature dependence suggests the spectral weight of antiferromagnetic fluctuation observed around 25 meV at (, ) shifts to resonance peak position below T
c. Moreover obtained results with E
i=80 meV neutron energy indicate new feature of dynamical incommensurate structure at higher frequency region up to 53 meV. |
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