Photoemission Study of La8-xSrxCu8O20: Impact of the Charge and Spin Density Waves on the Electronic Structure
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概要
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We report a photoemission study of La8-xSrxCu8O20 which shows antiferromagnetic (AFM), weakly ferromagnetic (WFM), and paramagnetic (PM) phases. All the samples in the AFM, WFM or PM phases are found to have a sharp Fermi edge with finite density of states at the Fermi level ($E_{\text{F}}$), indicating the metallic nature of the samples at different doping and temperatures studied. In the WFM and AFM phases, the spectral weight near the $E_{\text{F}}$ (up to ${\sim}{-}200$ meV) is partially suppressed. In the valence band spectra, the Cu 3d and O 2p derived states around ${\sim}{-}5$ and ${\sim}{-}2.5$ eV show different spectral weights in different magnetic phases. The observed changes in the electronic structure can be due to formation of the charge and/or spin density waves causing the anomalies in the electronic and magnetic transport properties of this system.
- 2010-11-15
著者
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Ito Toshimitsu
National Institute For Advanced Industrial Science And Technology
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Mizokawa Takashi
Department Of Complexity Science And Engineering And Department Of Physics University Of Tokyo
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Fujimori Atsushi
Department Of Complexity Science And Engineering And Department Of Physics University Of Tokyo
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Oka Kunihiko
National Institute For Advanced Industrial Science And Technology
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Saini Naurang
Department of Physics, University of Rome "La Sapienza", Piazalle Aldo Moro 2, 00185 Roma, Italy
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Joseph Boby
Department of Physics, University of Rome "La Sapienza", Piazalle Aldo Moro 2, 00185 Roma, Italy
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Iadecola Antonella
Department of Physics, University of Rome "La Sapienza", Piazalle Aldo Moro 2, 00185 Roma, Italy
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Iadecola Antonella
Department of Physics, University of Rome "La Sapienza", Piazalle Aldo Moro 2, 00185 Roma, Italy
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Saini Naurang
Department of Physics, University of Rome "La Sapienza", Piazalle Aldo Moro 2, 00185 Roma, Italy
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Joseph Boby
Department of Physics, University of Rome "La Sapienza", Piazalle Aldo Moro 2, 00185 Roma, Italy
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Saini Naurang
Department of Physics, Universitá di Roma ``La Sapienza'', Piazalle Aldo Moro 2, 00185 Roma, Italy
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