Enhanced Impurity Scattering due to Quantum Critical Fluctuations : Perturbational Approach
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概要
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It is shown on the basis of the lowest order perturbation expansion with respect to critical fluctuations that the critical fluctuations give rise to an enhancement of the potential scattering of non-magnetic impurities. This qualitatively accounts for the enhancement of the resistivity due to impurities which has been observed in variety of systems near the quantum critical point, while the higher order processes happen to give much larger enhancement as seen from the Ward identity arguments. The cases with dynamical critical exponent z=2 and z=3 are discussed explicitly.
- 社団法人日本物理学会の論文
- 2002-03-15
著者
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Miyake Kazumasa
Department Of Internal Medicine Division Of Gastroenterology Nippon Medical School
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Narikiyo Osamu
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Narikiyo Osamu
Department Of Physics Graduate School Of Science Kyushu University
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