Kink Structure in the Quasiparticle Band of Doped Hubbard Systems(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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By making use of the self-consistent projection operator method with high-momentum and high-energy resolutions, we find a kink structure in the quasiparticle excitation spectrum of the two-dimensional Hubbard model in the underdoped regime. The kink is caused by a mixing between the quasiparticle state and excitations with short-range antiferromagnetic order. We suggest that this might be the origin of the strong concentration dependence of the 'kink' found in La_<2-x>Sr_xCuO_4 (x=0.03-0.07).
- 社団法人日本物理学会の論文
- 2005-09-15
著者
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Fulde Peter
Max‐planck‐inst. Physik Komplexer Systeme Dresden Deu
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Fulde Peter
Max-planck-institut Fur Festkorperforschung
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Kakehashi Yoshiro
Univ. Ryukyus Okinawa
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Kakehashi Yoshiro
Department Of Physics And Earth Sciences Faculty Of Science University Of Ryukyus
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KAKEHASHI Yoshiro
Department of Physics and Earth Sciences, Faculty of Science, University of Ryukyus
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