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Imaging nanoscale electronic inhomogeneity in the lightly doped Mott insulator Ca(2-x)NaxCuO2Cl2.
Kohsaka, Y; Iwaya, K; Satow, S; Hanaguri, T; Azuma, M; Takano, M; Takagi, H.
Afiliación
  • Kohsaka Y; Department of Advanced Materials Science, University of Tokyo, Kashiwa-no-ha, Kashiwa, Chiba 277-8651, Japan.
Phys Rev Lett ; 93(9): 097004, 2004 Aug 27.
Article en En | MEDLINE | ID: mdl-15447131
The spatial variation of electronic states was imaged in the lightly doped Mott insulator Ca(2-x)NaxCuO2Cl2 using scanning tunneling microscopy or spectroscopy. We observed nanoscale domains with a high local density of states within an insulating background. The observed domains have a characteristic length scale of 2 nm (approximately 4-5a, a: lattice constant) with preferred orientations along the tetragonal [100] direction. We argue that such spatially inhomogeneous electronic states are inherent to slightly doped Mott insulators and play an important role for the insulator to metal transition.
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2004 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2004 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos