Vibronic states in La{2-x}BaxCuO4BaxCuO4 |
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Authors: | J. B. Goodenough J. -S. Zhou |
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Affiliation: | (1) Center for Materials Science and Engineering, ETC 9.102, University of Texas at Austin, 78712-1063 Austin, Texas |
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Abstract: | The temperature dependences of the resistivity R(T) and the thermoelectric power α(itT) under different hydrostatic pressuresP for the system La{2-x}BavCuO4, 0.11 ≤ x < -1.6, are reported and interpreted as evidence for strong electron coupling to oxygen vibrations along the CuO-Cu bond axes of the CuO2 sheets. The sensitivity of the transport properties to the bending Φ of the (180‡-Φ) Cu-O-Cu bond angle and their insensitivity to long-range magnetic order indicate that the segregation into hole-rich and magnetic stripe domains is driven primarily by electron-lattice interactions and not by electron-electron interactions alone. |
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Keywords: | La{2-x}BaxCuO4 vibronic states electron-phonon coupling |
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