Nuclear Quadrupole Resonance Frequency in Multilayered Cuprates
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概要
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The 63Cu nuclear quadrupole resonance (NQR) frequency $\nu_{\text{Q}}$ in the multilayered cuprates is calculated in the cluster model by the exact diagonalization method. The charge imbalance between the outer CuO2 plane (OP) with apical oxygen OA and the inner plane (IP) without OA in three-layered Tl2Ba2Ca2Cu3O10 is estimated by comparing our results with the experimental $\nu_{\text{Q}}$. In Tl-based cuprates with more than three layers, we predict a large enhancement of the splitting of $\nu_{\text{Q}}$ between OP and IP by taking into account the reduction in bond length between Cu and OA and the resulting increase in charge transfer energy. Our results show that the NQR frequency is a useful quantity for estimating the charge imbalance in the multilayered cuprates.
- 2009-12-15
著者
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Tohyama Takami
Yukawa Inst. For Theoretical Physics Kyoto Univ.
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Mori Michiyasu
Institute For Materials Research Tohoku University:crest Japan Science And Technology Agency
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Maekawa Sadamichi
Institute For Iron And Other Metals Tohoku University
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Tohyama Takami
Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502
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Shooshtary Navid
Institute for Materials Research, Tohoku University, Sendai 980-8577
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Maekawa Sadamichi
Institute for Materials Research, Tohoku University, Sendai 980-8577
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Mori Michiyasu
Institute for Materials Research, Tohoku University, Sendai 980-8577
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