Green's Function of Fully Anharmonic Lattice Vibration(Condensed matter: structure and mechanical and thermal properties)
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概要
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Motivated by the discovery of superconductivity in β-pyrochlore oxides, we study property of rattling motion coupled with conduction electrons. We derive the general expression of the Green's function of fully anharmonic lattice vibration within the accuracy of the second order perturbation of electron-ion interaction by introducing self-energy, vertex-correction, and normalization factor for each transition. Using the expression, we discuss the characteristic properties of the spectral function in the entire range from weakly anharmonic potential to double-well case, and calculate NMR relaxation rate due to the two phonon Raman process.
- 社団法人日本物理学会の論文
- 2009-02-15
著者
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Ueda Kazuo
Institiute For Solid State Physics University Of Tokyo
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Takechi Masateru
Institute For Solid State Physics University Of Tokyo
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