Incommensurate Magnetic Fluctuations in the UnderdopedCopper Oxide Materials |
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| Authors: | YUAN Feng FENG Shi-Ping CHEN Wei-Yeu |
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| Affiliation: | 1. Department of Physics, Beijing Normal University,Beijing 100875, China;2. National Laboratory of Superconductivity, Academia Sinica,Beijing 100080, China;3. Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China;4. Department of Physics, Tamkang University, Tamsui 25137,Taiwan |
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| Abstract: | The doping dependence of magnetic fluctuations in the underdopedcopper oxide materials are studied within the t-J model. It isshown that away from the half-filling, the magnetic Bragg peaks from the dynamical spin structure factor spectrum S(k,ω) areincommensurate with the lattice. Although the incommensurabilityδ(x) is almost energy-independent, the dynamical spin susceptibility χ'(k,ω) at the incommensurate wave vectors is changed dramatically with energies, which is consistent with the experiments. |
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| Keywords: | incommensurate magnetic fluctuations t-J model fermion-spin theory |
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