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ANALYSIS OF THE INSTABILITY AND PHASE TRANSITION OF THE COMPOUND La2CuO4 |
| ZHANG Min*;TAO Ruibao;ZHOU Shixun** |
| *Department of Physics, Fudan University, Shanghai
Center of Theoretical Physics, CCAST World Laboratory, Beijing
and Department of Physics, Fudan University, Shanghai
**Department of Physics, Fudan University, Shanghai
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| Cite this article: |
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ZHANG Min, TAO Ruibao, ZHOU Shixun 1988 Chin. Phys. Lett. 5 149-152 |
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Abstract The phase transition for La2CuO4 changing from I4/mmm to Cmca with cell-doubling has been analysed within the frame work of Landau's theory. It is a second order transition via softening of the optical breathing mode, coupling with a slight lattice distortion arising from the softening elastic mode based on electron-phonon interaction.
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Published: 01 April 1988
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