Influence of the orthorhombic distortion on the lattice vibrations in La2CuO4

✍ Scribed by S.L. Chaplot; W. Reichardt; L. Pintschovius

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 172 KB
• Volume: 219-220
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(95)00701-6

✦ Synopsis

When La2CuO4 (or (La, Sr)2CuO4) is cooled below the orthorhombic-to-tetragonal phase transition temperature, numerous changes of the phonon response have been observed in neutron as well as in optical spectra. A recently developed transferable potential model applied to the low-T and high-T phases of La2CuO4 successfully explains many of the changes observed at Ts at least qualitatively, if not quantitatively.